Won’t you like to build an airgun that pops rubber bullets?
Can you make a balloon spin and whistle at the same time?
Who can make a gun that can take water from a bowl and throw it the farthest?
Is it possible to make and shake a bug with a motor?
Can you float a magnet in air?
Can you make a magnet fetch fish for you?
How strong are your lungs?
Can you make a top that spins forever?
Can you make a fan rotate without electricity?
Who can make the best sounding drum?