Original DIY designs from truss bridges to rubber band race cars, helicopters and rockets.
Explore 30 cool projects or browse by category.
Rubber Band Helicopter
Powered by rubber bands, this helicopter is easy to build and can fly straight up over 20ft.
Suggested ages: 7+
Science Fair Experiment Guide
Propeller Powered Car
This rubber band-powered propeller car design is optimized for speed and distance.
Suggested ages: 9+
Marble Roller Coaster
Experiment with the science of momentum, potential energy, and conservation of energy.
Suggested ages: 5+
A classic mousetrap car design. Create the car, then use math to predict the distance it will go.
Suggested ages: 11+
Class 1 Lever Catapult
This push-powered catapult is an exciting way to teach the concept of a class 1 lever.
A quirky project, the pull-string spinner shows kids the concept of angular momentum.
Zip Line Racer
This simple propeller-powered invention zips along a taut string at remarkable speeds.
A simpler catapult that doesn't require hot glue, yet it can fire far and get kids excited.
Easy Pneumatic Machine
Experiment with the science of pneumatics (air pressure-power) to create a powered lift.
Keep these 3 quick and easy engineering activities on hand to fill out extra class time.
Rubber Band Car
A high-performing rubber band-powered car design. Big wheels provide traction and distance.
Triangle Truss Bridge
Stronger than a square-shaped bridge, this truss bridge design will hold extremely heavy loads.
Hydraulic Lift Bridge
Create a hydraulic-powered lift, then design and build a truss bridge to activate.
Engineer a hydraulic-powered box project for kids to store their small possessions.
Class 3 Lever Catapult
This rubber band-powered catapult is a fun way to show what a class 3 lever is.
Hydraulic Judo Robot
Create a custom hydraulic-powered robot project, then compete in a judo-like competition.
Egg Crash Car
Better than the egg drop challenge: Engineer a car that keeps an egg safe in a collision.
Use the science of aerodynamics to create a car that can gently glide to the floor.
Create a lightweight car that's easy to build and powered by the wind.
3D Geometric Shapes
Transform basic geometric shapes into more complex 3-dimensional forms.
Simple to build with a big payoff, the slingshot car zips across the floor surprisingly fast.
Easy Hydraulic Machine
Build a simply hydraulic mechanism, then customize its function however you'd like.
Slingshot Straw Rocket
Simple and cheap to build, yet slingshot straw rockets can be launched well over 75ft.
Bow and Arrow
A kid favorite, the craft stick bow and arrow is fun to build and exciting to play with.
Truss supports and rubber band power enable this durable slingshot design to shoot far.
Tornado Truss Tower
Build a strong tower comprised of trusses, then test its strength and stability.
Inspired by the 'viking catapult,' this design is simple yet strong due to the pyramid structure.
A kid favorite, the trigger launcher is easy to customize and a blast to use.
Engineer a mechanical hand, then test different designs until it can pick up anything.
DIY Robot Kits
Explore our Etsy shop of original robot kits made from laser cut wood and simple electronics.