Then why should adults pay an entrance fee to an amusement park while kids get in free at playgrounds (and then the adults pay taxes to fund their maintenance)?
Playgrounds, unlike amusement parks, are places where people can have fun and get exercise without using electricity or other artificial forms of energy.
@SIDI – There’s apparently a large tube slide in one of LEGO’s offices. Saw a video some years back of one of their employees launching Cars models down it. 😀