Build a balloon helicopter that can fly at least 3 feet from the ground.
Make a ball and socket joint that mimics the movement of a human hip or shoulder.
Camouflage an animal in any environment so that you can’t see it – even in plain sight.
Create a simple machine that transfers a rotational motion into a linear vertical motion.
Build a simple circuit that enables you to turn on a small LED.
Design a waterwheel that can generate electricity from the flow of water.
Design and build a simple generator that turns on a small LED light for at least 1 minute without using a battery.
Turn a straw into a simple machine that works in the same way that the joints in your body work.
Build a simple machine that transfers rotational motion into linear reciprocating motion (repetitive back and forth motion).