Photos: Green buildings for the rest of us

Toys are green, too! Here are a couple of examples of toys that double as teaching opportunities. Whether or not you're a parent, it's pretty cool to see solar power at work on an elevator, made from the kit on the left.

The H-Racer, meanwhile, from Horizon Fuel Cells includes an actual fuel cell and a fueling station that makes hydrogen from water, using electrolysis. The fueling station is powered by a small solar panel, or you plug it into an electrical outlet.

These sorts of things are great for helping people, especially children, make energy tangible. In the case of Horizon Fuel Cells, their toy business is helping fund investments in fuel cells for other applications like backup power and light vehicles.