For children and adolescents, we recommend the Scalextric track, powered by two EnergyBikes. The car track is 12 meters long and two cars race on it.  Each bike powers one car. The faster you ride the bike, the faster car moves on the track. As in a traditional car racing, the whole thing is to adjust the speed of the vehicle so that it does not fall out of the track.  The fun takes place with the help of an animator who comments on races  and controls the queue.