Electric cars don't get much better than this. Designed by MIT engineers, the "CityCar" concept gives compact a new meaning. In addition to being stackable, they are also eco-friendly. This high-tech vehicle has wheels with integrated motors that can also rotate a full 360-degrees while moving. You won't find seat belts in this car because responsive seats, also called "fingers", hold a person back during an accident. Video after the jump. Click here for first picture in gallery.