Make a satellite that can hold a cup of water and does not leak during a bumpy rocket launch.
Build a system that controls the movement of material and shuts off automatically.
Build a joystick that can turn on and turn off multiple things
Build a satellite with a 6-inch square body that can deploy its own solar wings and antennae, and can fit inside a 9-inch diameter tube.
Make a mechanical tail that is strong enough to break through a piece of paper.
Build a fast, stable boat that can move through the water for at least 1 foot using a hand-powered propeller.
Build a peg board that lets you test multiple linkage systems and the types of movements.
Animate a facial expression and make a machine (zoetrope) that plays the animation back.
Build a wind powered turbine that can pump water up from the ground.