「ミニ四駆」。http://www.youtube.com/watch?v=WOy-Ws_sBl4&feature=related[youtube=http://www.youtube.com/watch?v=WOy-Ws_sBl4&w=425&h=350]http://www.youtube.com/watch?v=-HiBeGumf7s&feature=player_embedded[youtube=http://www.youtube.com/watch…