Comment by sandworm101

PlayPump failed, as so many others, because children do not make good horses. Countless projects in many fields have attempted to "harness" children for energy. There was the soccer/football generator (https://www.youtube.com/watch?v=oeb2fyHKirQ). I've even seen attempts to install power-generating floor tiles in English schools (https://www.youtube.com/watch?v=_9AZxB55xjI). We think we can tell children what to do, use them as beasts of burden, but they are not a reliable power source.