The idea behind the GyroBike is pretty obvious — once you’ve been told about it:
The Gyrobike™ employs spinning flywheel inside the front wheel that uses gyroscopic precession to provide a bike moving at 2.5 mph with the natural stability of a bike moving at 10 mph. This natural stability has been demonstrated to enhance the process of learning to ride a bike — something that training wheels have never been able to do.