John can ride a two-wheeler!!!
Our neighbor, whose four-year-old has been riding a two wheeler forever, told us he used the push bike technique. So when Pa was here, he took the training wheels and pedals off John's old little bike. It only took about 2 weeks of him coasting around on it and he had very little trouble of transitioning back to pedals and no training wheels! I highly recommend this method!
He hasn't made it back onto his big bike that is actually the right size yet, that may be when some spills occur, but the "push bike" definitely got the feel of balancing into his body in a way nothing else could!
Hurrah!
