How can I keep a marble in motion for 2 minutes? I've had 2 suggestions so far: *A simple way would be to put a marble in a bucket and move the bucket so the marble spins along the walls. *Another idea is to have a teeter-totter, using a long plastic tube. Have a string attached to each side. Put he marble in one one of the tube and pull the other one down. Then alternate pulling an end down to keep the marble moving. Have and caps on the tube so the marble can't escape. But, if i can only touch it once and that's to start if off. how can i do that way? Your thoughts?