Create a tube that can separate different objects based on how you you build the walls.
Make spheres that are all the same size.
Make a structure that can change how waves move, and learn how to make things invisible!
Design a coating for a magnet that will pick up different surfaces.
Make a container (out of pasta) that can travel along a zipline and deliver a cargo (candy).
Build a water filter that can clean dirty water.
Build a lightweight wing structure that is 12 inches long and can hold up a heavy load (weight) without deflecting.
Make pieces for a structure that builds itself using magnets.
Create a bio-glue that holds together a graham cracker skyscraper.