ROBOT PROJECT. Fits on 34 x 28 inch base Has at least one moving part After starting, no touching or other human interaction Controlled by an Arduino microcontroller Costs no more than $50 beyond parts provided (microcontroller, motors, battery, ...) Is safe.
“Design and construct an autonomous machine that does something useful and interesting for 30 to 60 seconds”
Robot Project Brief is final word on rules
Plus……$0 to $50 of your own parts
Garages, dumpsters, junkyards, Ax-man surplus, …