Kid-powered school bus
Leave it to the Dutch to figure out how to replace even school buses with a conglomerate of bicycles. The buscycle, used to transport kids to day care, turns elementary schoolers’ boundless energy into a source of renewable fuel.
There’s a grown-up steering, plus room for at least a few non-pedalers (though they should beware strict Dutch law that heavily penalizes anyone not actively engaged in riding a bike). Other features: a convertible roof, a small engine in case of critical snack and juice box failures, and a built-in sound system.