Not a member? click here to register.
I forgot my password.
SUBstitute
Inventor's IQ Points for this activity: 100
Clicking "Go Play" will send you to another site. Please read this important message about the links at our site.
Using materials found around the house and a small empty plastic container that has a lid, build a submarine that neither sinks to the bottom nor floats on the top, but hovers for at least 10 seconds in the middle of a bathtub, bucket or sink.
Where should you upload your picture?
