All
Art
Building
Machines
Musical
Party
Toys
Vehicles
Medium
The Sneaker Challenge
Design sneakers that do not harm the environment when created or thrown away.
Medium
Seismic Shake-Up
Design a building that can survive an earthquake—then put it to the test!
Hard
Speedy Shelter
Design and build an emergency shelter that can fit one person and is sturdy and easy to build.
Medium
Sky Glider
Build an airship called a blimp that travels in a straight path across the room.
Medium
Inspector Detector
Design and build a device that can pass above a surface and detect magnetic fields.
Easy
Headphone Helper
Design and build a headphone system to hear an instrument better.
Hard
Down to the Core
Design and build a tool that can take a core sample from the center of a potato.
Medium
Blimp Jet
Build a blimp that uses balloon power to travel in a straight path across the room.
Medium
Zip Line
Design and build a Ping-Pong carrier and send it down a zip line in 4 seconds (or less)!
Hard
Soft Landing
Design and build a cushion system that can safely land an egg dropped onto the floor.
Easy
Sky Floater
Make a balloon hover in one spot and move around when you create air currents.
Hard
Roving on the Moon
Design and build a rubber band-powered car that can crawl across the floor.
Medium
Paddle Power
Build a boat that paddles across the water using the power of a rubber band.
Hard
On Target
Modify a cup so it can zip down a line and drop a marble onto a target.
Medium
Kick Stick
Build a handheld device that uses a spinning, motor-driven arm to kick a Ping-Pong ball.
Medium
Kicking Machine
Build a machine that will send a ball at least 12 inches across the floor.
Medium
Helping Hand
Design and build a device that lets you grab and drop objects from at least 2 feet away.
Hard
Heavy Lifting
Design and build a crane and see how heavy a load it can lift.
Hard
Dance Pad Mania
Build a dance pad that lets you use your feet to sound a buzzer or flash a light.
Easy
Build an Instrument
Build a four-stringed instrument that can play a tune in different pitches.
Easy
Watercraft
Build a boat that can hold 25 pennies and stay afloat for at least 10 seconds.
Hard
Touchdown
Design and build a shock absorbing system that will protect a spacecraft's landing.
Medium
Rubber Band Car
Build a fast, two-wheeled car that is powered by a rubber band and can travel at least 4 feet.
Medium
Robo Arm
Design and build a robotic arm that can lift a cup off the table.
Easy
Pop Fly
Invent a way to launch a Ping-Pong ball high into the air.
Hard
Paper Table
Design a paper table that's at least 8 inches tall and strong enough to hold a heavy book.
Easy
Launch It
Build an air-powered rocket that can hit a distant target.
Medium
Kinetic Sculpture
Build a structure that has two or more parts and moves in the wind.
Hard
Hidden Alarm
Design and build a battery-operated alarm so small that it’s easy to hide.
Hard
Harmless Holder
Invent a holder for a six-pack of cans that is animal-safe, sturdy, convenient, and easy to carry.
Easy
Confetti Launcher
Design and build a device that launches a spoonful of confetti into the air—the bigger the cloud, the better!
Easy
Triangle Pop-Up Card
Make a fun triangle pop-up card that will amaze your peers!
Easy
Floating Box Pop-Up Card
Create a floating box pop-up to surprise your friends!
Easy
Box Pop-Up Card
Delight your friends and family with a card that works in surprising ways.
Easy
Hovercraft
Float a disk on a cushion of air and play games like air hockey.
Medium
Hack a Greeting Card
Surprise your friends with this sound system that you can hide or wear.
Medium
Glow Sticks
Make a string of glowing lights that you can dance with, read by, or wear.
Easy
Build a Better Lunchbox
Keep a frozen treat from melting.
Hard
Bristle Bots
Make a mini robot that skitters around the room.
Easy
Balloon Joust
Slam two balloons into each other for a fight to the finish!
Easy
Balance Magic
Balance a sculpture on the point of a toothpick.
Easy
Air Cannon
Pop a pom-pom up to the ceiling or across the room.
Easy
Treasure Grab
Get all the treasure you can, using a crazy collector that tests your driving skills.
Easy
Indoor Slingshot
Play carnival-style games using this power launcher.
Medium
String Puppet
Make puppets that move, bend, and twist at your command.
Easy
Unpoppable Balloon
Do the impossible! Pass a stick right through a balloon without popping it.
Medium
4-Wheel Balloon Car
Make 4-wheeled, air-powered cars that jet across the floor. Race ‘em. Use ‘em to play games.
Medium
2-Wheel Balloon Car
Make 2-wheeled, air-powered cars that jet across the floor. Race ‘em. Use ‘em to play games.
Easy
Marshmallow Blaster
Blast a marshmallow across the room!
Easy
Robo Wheel
Rev up this monster wheel to race it, or do freestyle tricks with it!