Toys are truly a reflection of the time in which they are sold. This new car set from Tamiya has only been around for a short while, and it's already temporarily out of stock. (No worries; Tamiya America says it plans to get more in.)
You don't have to live in Colorado for the wind turbine to work. Specially shaped blades and different gears allow the turbine to turn from the slightest breeze. The stand doubles as a handle, so kids can also run with the turbine to create their own wind (and tire themselves out from exercise).
For every one to two minutes the car spends parked recharging its battery at the wind turbine station, the car gets about 5 to 10 minutes of play time. That may not sound like a lot, but consider kids' short attention spans and that recharging is part of the play. The increments probably work out just fine.
It's recommended for ages 15 and older, but that seems mainly because it's an assembly kit. Once assembled by the cool aunt or uncle who gave it to them, it seems like any 7-year-old could easily play with it.