Well, you saw what happened in the movie; 'Conan the Barbarian'.
Hyperactive, or ADD children, rarely if ever will concentrate on a useful task for any amount of time before they kick, scream, and have a temper tantrum.
Ever hear of merry-go-rounds or seesaws? :-)
The easiest way to fix that is to connect a game console to a pedal powered generator. :-)
Yes, but when my youngest daughter who was hyper got on the merry-go-round she got bored easily. Seriously. she had a short attentin span for most things. We had her in the neighborhood theater, the neighborhood art gallery and the recreation center. She also volunteered. She still had energy. lol