Build a robotic face that can make facial expressions using simple machines.
Create a circuit that has no metal wires and uses at least three different conductors.
Build a crane that uses simple machines and mechanical advantage to move heavy objects.
Design a robotic arm that can move a marble, a straw, and a washer from the table into a cup without using your hands.
Build an air-powered spinning machine inspired by Boeing CST-100 Starliner.
Build a mighty machine that jumps up, sideways, or flips over. The whole structure should jump into the air.