Jyrobike on Kickstarter ditches the training wheels for a Control Hub built into the front wheel that is able to generate a stabilising force that resists the toppling force of gravity. The Jyrobike is for those first time bike riders for kids. As your kid learns to ride you can dial down the auto balancing feature until your child rides on his/her own.
You can get a Control Hub for a $79 pledge or a complete Jyrobike for $249.
Back this now at Kickstarter HERE