Maker Faire 2025

July 30, 2025July 30, 2025 Lutin

We are very excited to announce HipMonsters.com will be presenting RobotFreedom at this year’s Bay Area Maker Faire, September 26 through September 28th at Mare Island! We have been training our emotional robots for over a year, living with them, playing with them and watching them grow. Come see our robots in action live!

Here is a recap of the 2024 Bay Area Maker Faire to give you a preview of what to expect. These are some of our favorite exhibits, from an underwater robot explorer to a giant inflatable cuttlefish car.

This is the Maker Faire Bazaar, where visitor can find all sorts of handmade goods, like dice, pottery, and even 3d-printed hot chocolate.

This is a big working model of the solar system that is the size of a room. All of the planet’s orbit times are proportional to the real ones.

This is a small model of a bakery with working lights and miniature baked goods.

This is an old battlebot, complete with two giant spikes in front and four googly eyes (Maker Faire 2023).

This is the Humanoid Robot Comedy Show. These robots can move their faces to show facial expressions and look you in the eyes while they tell jokes.

This robot is built for battle. This is one of the robots that fights in an arena against other robots. It is remote controlled and has arms that can swing around.

This is Dalek FAX, a remote controlled model of a Dalek that moves and talks.

This small robot is built by ROV Tour: Underwater Robotics Adventure. They are remote controlled and have cameras that can show footage of its underwater adventures.

And the award winning After.AI whose 3D printed mechanical flip signs were so fun to watch!

This amazing clock uses a whole wall full of gears to tell time.

This is a part of Serenity, an art exhibit showing three insects that shoot fire at a press of a button (Maker Faire 2023).

These are parts of Astro Botanicals Space Garden, which is a collection of glowing handmade inflatable plants.

This is Sepia Lux, a giant inflatable cuttlefish car that lights up. The tentacles and the fins of the cuttlefish can move, and the eyes can change colors.

This is a truck inspired by a beetle complete with wings and a bright green shell.

This is a peacock vehicle that lights up and moves.

We are looking forward to seeing you all at this year Bay Area Maker Faire!

Hope you find inspiration!

Sutter’s Fort

July 24, 2025July 22, 2025 Lutin

Sutter’s Fort is around a two hour drive from the San Francisco Bay Area. Built in 1839, it is in the first permanent European colonial settlement in Central California. Sutter’s fort was the economic center of the settlement, it had bakeries, blacksmiths, and other businesses that most people would need. It lost its importance in 1849 when the gold rush caused many people to rush to California, who competed with Sutter’s businesses.

Here is where they made barrels. Barrels were an essential part of frontier life, holding everything from pickles to gunpowder.

And here is our favorite store, the apothecary store, where you could get herbal remedies and cures as well as coffee.

This is the general store, where the settlers would buy everyday objects such as silverware, food, and simple tools.

Here is the carpentry shop. This shop supplied many important things, such as barrels, furniture, and tools. You can see the tools in the background which the carpenters used for woodworking. Many are very similar to modern woodworking tools. We love seeing workshops to get new ideas on how to improve ours.

Hope you find inspiration!

Castello di Amorosa

May 15, 2025July 13, 2025 Lutin

Ever wish a medieval castle was just a drive away? In you live in the San Francisco Bay Area, you can visit Castello di Amorosa. It is in Napa just two hours away.

Castello di Amorosa: Napa Valley Castle Winery in Calistoga

We sometimes need to break from the workshop, and Castello di Amorosa is one of our favorite places to relax and refill our creative well.

Castello di Amorosa: Napa Valley Castle Winery in Calistoga Court yard

The attention to detail is amazing, and they capture the feel of ancient castles in Europe.

Castello di Amorosa: Napa Valley Castle Winery in Calistoga Hall way

Dark and spooky corridors can be found to given you inspiration and chills. Sometimes you can find hidden passageways.

Castello di Amorosa: Napa Valley Castle Winery in Calistoga Knight

Beautiful murals and statues are found throughout the castle. There is so much detail to the murals, and everything is done in the same style as the ancient castles.

Castello di Amorosa: Napa Valley Castle Winery in Calistoga Knight

Here is a suit of armor stand ready for action. In the background you can see a beautiful mural that shows the knights going into battle.

Castello di Amorosa: Napa Valley Castle Winery in Calistoga Gift shop

Everything has the perfect patina to give it a timeless and well-worn look. The tiles in this image are skillfully decorated with intricate patterns.

Castello di Amorosa: Napa Valley Castle Winery in Calistoga downstairs

Here are some more mysterious dimly lit corridors.

Castello di Amorosa: Napa Valley Castle Winery in Calistoga View from the front

The outside of the castle looks just as real. You can see the guard towers and the merlons, and you can even walk along the castle wall. There is also livestock outside the castle.

Hope you find inspiration!

Maker Fest at Ecole Bilingue in Berkeley

April 29, 2025July 22, 2025 Lutin

The Hip Monsters team was thrilled to be invited to a Maker Fest last week at Ecole Bilingue in Berkeley, CA. Ecole Bilingue is a preschool to eighth grade French immersion school focused on preparing their students to make a positive impact on the world.

We had a wonderful time at the maker fest and it was amazing to see such talented makers and dedicated students. The event had great food (including handmade boba tea), a fun crowd, and an exciting lineup of makers. It was a beautiful day in Berkeley which added to the cheer.

Below are just some of the makers at the festival.

Hip Monster’s Robot Freedom

We were there with Number Three of RobotFreedom, who got a chance to test out her new legs. We will have a post in a bit on her leg redesign. The legs worked well and the batteries lasted longer than we anticipated.

We also brought our pneumatics demonstration which is an ideal place to start kids (and adults) on robotics.

The Sewing Corner

There was a great sewing section with helpful makers who quickly got even first time sewers make a tote bag.

Here is a finished toto bag! We have already put it to good use storing cat toys.

Magnification Mayhem vs. Resolution Rumble!

George and Janai Southworth from the San Francisco Microscopical Society had a fantastic demonstration of microbiology. They showed how different filters and lightning impacted what could be viewed through the microscope. Below is a petri dish of bacteria waiting to reveal its secrets.

Solar Racing Car

Members of the UC Berkeley CalSol Solar Racing Car were there giving us the inside scoop on their upcoming race in Nashville, TN. Every few years the car is completely redesigned and rebuilt using the most up to date technology.

3-D Print Making

There was 3D printing space with a great collection of designs and examples. All the designs were coded by kids!

Here is our favorite creation, a 3d printed pink rabbit.

Bike Powered Smoothie Machines

The bike powered smoothie machines were steampunk inspired pieces of art. They were designed and made by the talented students at Ecole Bilingue. They also are a great way to make sure you earn those calories in the smoothie. Every household should have one of these!

The designs are modified stationary bike with blender connected to the front wheel.

Here are the bikes in action making a smoothie.

Painting Robot

They even had a robot making art! It was fun watching the robot as it dutifully created its next masterpiece.

Here is a view of the business end of the painter bot.

Space Wars

And last but not least, a RaspberryPi powered game console designed and built by one of the students. The compact design had custom made controllers that allowed for two person games.

The stand was a clever design using a cardboard box as a case neatly cut so it looked.

Thank you so much to Ecole Bilingue for inviting us to the maker fest! We would love to participate in more of your events in the future.

Hope you find inspiration!

First Robotics Competition in SF

April 9, 2025April 7, 2025 Lutin

We had a lot of fun at the First Robotics Competition at St Ignatius College Preparatory in San Francisco CA. We cannot think of a better way to spend the weekend than watching teams of highly skills robotics engineers compete for fame and glory!

Above is a photo the entrance to St Ignatius located in the heart of the Sunset district in San Francisco.

Below is a video showing one set of the robotic competition.

The goal is for your team to finish as many tasks as possible before the time runs out. Each team has three robots: two that are focused on competing tasks and one that tries to disrupt the other team’s robots. The court is divided in two with each team having one side as their home where they perform their tasks. The tasks are placing the tubes in a slot, throwing a ball and lifting themselves up at the end of the round.

Here is a close up of one of the robots, number 6822. It is amazing to see how many different and creative designs the teams come up with. For example, some receive the tubes from feeding machine while others scoop them up from the floor.

Here is another robot, 7667, waiting to be serviced.

Above is a photo of a typical repair station. Like with the robots, each team has their own layout and collection of tools optimized for their robot’s design. We had serious tool envy as we walked through the pit.

While none of our photos have people, the event was crazy crowded. We made sure to exclude people when taking photos, so missed about half of the teams at the events. Below is a sample of some of the teams there.

The Otter Bots.

The Aztechs from Alameda, California.

And team 846 with the absolute coolest pin dispenser ever!

The Breaker Bots.

The Pirate Robolution!

The Bot-Provoking.

Bora Robotics from Türkiye!

Blue Magpies from Taiwan!

Find your inspiration!

Pneumatic Robotic Arm Workshop

March 27, 2025March 29, 2025 Lutin

This pneumatic robotic arm workshop is design to introduce basic concepts of robotics and making to grade-school students. The design is based on ones used in middle school and high school robotic competitions. We have created a simplified version for one-time workshops with kids of all ages.

Please note, this material is provided for informational purposes only and is not a guide on how to create the designs. Please take a look at our disclaimer.

The two main science concepts are:

Leverage: A lever is a simple machine consisting of a bar that pivots on a fixed point (fulcrum). Levers are used to amplify input force. The robotics arm requires placing the syringes in positions that exploit leverage. You can find out more here.
Pneumatic:Pneumatic power uses compressed air as an energy source. Basic components of a pneumatic engine are: reservoir, pump, value and cylinder. In this workshop the syringe is the pneumatic engine. Pneumatic power is widely used in robotics and industry. Here is a link for other project ideas.

Required Supplies:

Each student will require:

x4 syringes
x2 4-inch piece of tubing
1 4×4 piece of wood
x5 Popsicle sticks
X2 nut and bolts

The photo below is the full-scale model used in high school competitions. It requires 2-3 students to control. One of the Hip Monster sisters built it at a Sacred Heart Robotics Camp in San Francisco, CA.

Here is a side view with the arm down.

The competition involves stacking blocks and the score is based on time it takes to move all the blocks and height of the stack. Controlling the arm is a true team effort with 2-3 students working together to move the arm. The winning design not only requires good engineering but perfect team work. Engineering competitions are ideal ways for kids to develop technical as well as social skills. Below is a video of the arm in action:

For our grade school work shop we choose a smaller and simpler design that only required one student to control the robotic arm. You can still have a team competition with two students per robot (one controlling each syringe) if desired.

Below are several views of our simplified design. Instead of zip ties we use rubber bands and tape.

Here is a view from above. This design does not use hot glue and is suited for all ages.

This is another design suited for more advanced students.

Here is a side view showing the placement of the syringe in the middle of the base to provide better range of movement.

In the video below one of the Hip Monster’s sister’s team does a quick build of an arm.

Here are the step by step instructions:

Drill a hole in the center of the square plywood which will be the base for your robotic arm.
Now push a bolt through the hole and secure it using a nut. The bolt will be the support for your arm.
Drill a hole on one end of four popsicle sticks.
Use the two popsicle sticks placed on either side of the bolt with the holes on the top.
Secure using rubber bands making sure to let it pivot.
Secure a syringe to a popsicle stick. This popsicle stick provides leverage helping move the arm.
Use rubber bands instead of tape or glue. Rubber bands let the mechanism flex as the pump extends pushing the arm.
Attach the piping and connect another syringe.
Adjust the two syringes so when you depress one the other extends.
Attach one end to the popsicle stick using a rubber band.
Next secure the other end to the edge of the base using tape.
Slow depress the syringe pump your arm will move!
Now attach two popsicle sticks to the top of the arm.
Secure with a bolt and nut.
Secure the syringe pump to the forearm with rubber bands.
Now attach the syringe base to the arm using tape.
Connect the other syringe.

Now you pneumatic robotic arm is complete!

To improve performance you can turn your pneumatic robot to a hydraulic powered one by just adding water! You can get more information here.

Happy Creating!

Star Wars at Fan Expo San Francisco 2024

February 13, 2025February 23, 2025 Lutin

As we are getting for ready for this year’s SF Fan Expo, we wanted to post about last year’s fun! We enjoyed all the fandom at the expo (Doctor Who, Star Trek and more) but given our Star Wars cosplay theme this year, we decided to highlight Star Wars.

First, a special call out to the 501st Legion who very quickly recognized one of the HipMonster’s crew cosplaying as Doctor Aphra (one of out all time favorite characters).

The 501 Legion gives advice on how build you own weapons, helmets, and even toys using 3d printers. If you want to print your own Storm Trouper helmet, they will set you on your way!

Here are a few of their 3-D printed toys. The 501 Legion is not only about cosplay and 3-D printing, they also do charity work across the Bay Area.

Here are some of the 3-D printed kits. If you are a Star Wars fan make sure to swing by their booth this year!

If you want your own droid, the Droid Builder Bay Area is the best place to get started. They create life-size droids that look exactly like in the movies. This club of like-minded droid makers are always open to a new member.

This cute little robot can easily be 3D printed at home!

The star of the show was the R2D2s which all looked identical to the one in the movies. We would love to put our AI in one of those machines!

A C1-10P (aka Chopper) from Star Wars Rebels.

There is even a mouse droid!

If the Force is in you, then it is about time you picked up a lightsaber. The FanExpo had several vendors ready to equip Jedi and Sith alike! We loved HookedOnSabers, who lets us examine and try a few of the lightsabers out, even when we were not going to buy one.

As huge Doctor Aphra fans, we were thrilled that Heather Antos was attending! She was an editor on the first Doctor Aphra series and helped bring her to life! Heather Antos was a lot of fun and we even got some inside information from her about the making of Doctor Aphra, and recommendations of other great series!

Drawing of Star Wars character Doctor Aphra. — Here is how I feel thinking how long I have to wait to this year’s Fan Expo.

We also want to give a shout out to comic book writer Jody Houser who signed every scrap of paper we shoved in front of her.

Maker Faire Bay Area Robot’s View

November 4, 2024November 30, 2024 Lutin

Thanks to everyone who helped this year’s Maker Faire Bay Area be so special! We are looking forward to seeing everyone next year and are already improving our show. Below is a photo our booth before the event started. It is hard to believe over one thousand people visited us over the course three days!

Want to see how our autonomous robots experienced Maker Faire Bay Area? Check out the video below, generated based on the stimuli, emotions, and actions of HipMonsters’ two robots over the course of three days at the Maker Faire.

The robots recorded the following sensory data:

💙 Noise: A sudden, loud noise. Represented by the color Blue.

💚 Distance: Motion within 1 foot. Represented by the color Green.

🧡 Movement: Motion within 6 feet. Represented by the color Orange.

💛 Speech: The spoken word “robotics”. Represented by the color Gold.

💗 Touch: Contact on the touch sensor. Represented by the color Pink.

🤖 Frequency of Stimuli: How often or rarely the robots received stimuli. Captured by the Movement of the cube.

🔉 Mood: Happy or overstimulated. Reflected in the choice of Sound.

Turn up the volume of the video! It’s not music you’re hearing, but the robots’ moods given the stimuli.

Since we engaged the Touch sensor at the end of each demo, this means we ran 420 complete demos over 3 days. Our robots have been well socialized!

Happy Creating!

Bell Hopper – Contraption Delta

October 14, 2024October 14, 2024 Lutin

For our upcoming Maker Faire presentation we wanted to make robotics more approachable. One barrier to robotics is, by its very nature, it lacks a human element. To bridge this robot-human divide, the bell hopper design requires two humans working together to power and control it. This only one goal, ring the bell.

Please note, this material is provided for informational purposes only and is not a guide on how to create the designs. Please take a look at our disclaimer.

The bell hopper ended up very similar to the first drawing of the concept, which is rare for us. For the base board we used one of our small robot rig platforms. We use it to create supports for testing robot movements. It ended up looking so good we kept it for the final design. We always wanted ringing a bell to be the goal of the contraption, but originally did not think of using it as the head. Once we saw the bell with the body we changed the design to have it as the head because they fit so well together.

Here is a top view with the bell attached. The head’s weight caused a few engineering issues for us. The body was made of super light aluminum and the bell was heavy brass. To solve this we create a swinging counter balance inspired by the counter balance in Taipei 101.

For the switch to redirect the air we used a standard manual pneumatic lever. It is the same one we use for testing our robots.

The power supply is a bicycle air pump painted bronze to look more steampunk.

Here is the final design of the bell hopper.

It take two people working together to get the bells to ring. Cooperation is key! Come see it and more at this year’s Bay Area Maker Faire.

Happy Creating!

Leibniz Calculator- Contraption Gamma

October 11, 2024October 14, 2024 Lutin

For the upcoming Maker Faire the Hip Monster’s sisters team wanted a challenge. Something that required precision and also aligned well with our theme of education and steampunk artistry. What they choose to do was a true mechanical mind, a computer built with gears, the Leibniz Calculator.

Please note, this material is provided for informational purposes only and is not a guide on how to create the designs. Please take a look at our disclaimer.

This proved to be our hardest project to date. While videos online had it look simple the precision proved difficult. We first designed a rig composed of separate segments of wood so we could explore different layouts for the gears and rods quickly. Arguable the most critical part, the step drum (the wheel like gear) was completed by the sister team in a few hours which gave us false hope the whole project would be easy.

The step drum shown above is in the center of the device. It was made from a circular piece of wood with nine evenly spaced holes along its edge. In each hole we put screws of different lengths that could be adjusted with bolts to “tune” the device on the fly. At first, we thought this would be a temporary solution but in the end we did not modify it. The device proved to be finicky and our step drum’s ability to be tuned was essential to get it to work.

Over months of trial and error and rewatching youtube videos endlessly we finally had the Ah-Ha! moment. The rig stayed in the exact same position on our workbench as a parade of other projects were started then finished as it rested, in complete. Then everything just clicked, one sister released that we were thinking two dimensional when the problem was in the third dimension. The the other sister fixed the rig and then the Leibniz Calculator worked like a charm.

Here is the final design with some added steampunk flourishes. See it in person at this year Bay Area Maker’s Faire. This project only succeed by everyone working together, listening to everyone’s ideas and refusing to get frustrated. In the end it feel more like a piece of art than calculator.

The above video shows the user adding. You use the Leibniz Calculator by first positioning the step drum to the value you want to add, subtract or multiply. Then you rotate the drum. As it spins it engages the counting gear which keeps track of the current value of the computation. The key is, since the step drums spokes are of different lengths when the drum is rotated the counting gear only is turned based on the length of the spokes. You add by rotating the drum clockwise, subtract by counter clockwise and multiply by doing a full rotating the number of time you want to multiply a value by. For example, if you want to multiply 5 by 4 you set the step drum to 5 and rotate it 4 times.

Above you see the tens dial to the left, showing 2 which is twenty (5X4).

Happy Creating!