This morning, Colin told his dad -- "It's time to take my training wheels off". Bo took them off this afternoon, and came in about 3 minutes later telling me to come outside. I came out - and Colin was riding with no problems! When he's ready to do something . . . he's ready! He's been riding all afternoon - including around the block 3 or 4 times, as well as back and forth our part of the street.