Well, I don't think it's even POSSIBLE to parent a figure's hands to something -- they're permanently parented to the figure's forearms. Likewise, the feet are permanently parented to the shins. So you'd need to do it the other way -- parent the pedals to the feet, and the handlebars to the hands. :-) Although, I'm not sure you'd really need to parent the handlebars to anything. I mean, do the handlebars or the rider's hands really MOVE that much when riding a bike?