Get your kids thinking about alternate energy sources with the Tamiya Loopwing Wind Power Generator Set. The windmill has a loop-wing design with low-friction connectors that needs very little breeze to run. A rechargeable vehicle is included that, after a 5 to 10 minute charge, can run for 1 to 2 minutes. The set has a double gear for light wind and triple for strong, and the base can also be used as a handle. Pre-order for $67.00, which sounds expensive until you realize no fuel costs are involved.