Whatever you call them hover boards, self-balancing scooters, or air wheels, they have become the hottest toys of the year in the last few months. A hover board is a two-wheeled motorized gadget that can be used as a personal transportation unit and do t actually hover, but roll. They possess two pressure-sensitive footpads that control speed and direction. The idea for this device was first explored in 1989 in the popular movie Back to the Future which was Michael J. Fox's special effects ride. It seemed like only a dream, but thanks to science and techlogy, they have become reality.