Gyroscopic Training Wheels

There is now an alternative to training wheels when teaching a kid to ride a bike. It is called the Gyrowheels (http://www.thegyrobike.com) and is basically a battery operated flywheel in a specially designed bike tire. The flywheel acts as a stabilizer.

Video embedded below. (from http://www.popsci.com/gear-amp-gadgets/article/2009-09/video-future-training-wheels)