Energy Park

A vast ghost house with attractions made to make the kids sweat (ball pools, falling ladders, you name it). All the "games" are designed with electromagnetic systems made to suck a little bit of the energy displayed by the frantic kids. May seem like another exploitation idea, but think about it this way:

_ Kids get a safe place where they can use their whole energy, which gets rarer and rarer in big cities (look at the kids in tokyo).

_ The park is free, as the energy sold pays tha maintenance and employees.

_ Parents can tolerate to be in the vicinity of kids (as the latter are no more hyper, they may even be able to socially beahave, let's dream), even when they are tired by a hard day's work, stressed about life, and depressed about the general mediocrity of their surroundings.

_ Kids get regular exercise, increasing the quantity of O2/mm3 of blood, therefore making them smarter.

_ Finally, with an average of 20% of the population producing only 10 watt 1 hour a day, you get the equivalent of 10 nuclear plants in the USA.

_ Eventually, to make it even funnier for the kids, there could be "restricted" areas you could access only after producing a certain production average in other areas, in a pokemon/yu-gi-oh style.

_ Of course, the adult versions coulds follow, in many forms, such as ecologic gym clubs, etc.....