Create a tube that can separate different objects based on how you you build the walls.
Make spheres that are all the same size.
Build a machine that distributes seeds precisely.
Build a circuit using conductive everyday objects
Engineer a robot that turns itself off when it leaves a safe area.
Create a network that classifies information
Build something that can sort data through multiple parallel channels
Build a game board that acts as system of circuits to navigate around obstacles
Design a robotic arm that can move a marble, a straw, and a washer from the table into a cup without using your hands.