Last weekend my daughter 3 (4 this friday), decided she wanted to ditch the training wheels. She didn't want to lose the pedals until she admitted they were getting in the way. So she spent last weekend scooting around with no pedals.
Pedals I put the pedals back on Sunday (threw a major fit on Saturday, and I had to pull the no bike card.) that stunk . After 1 false start, she took off and that was that.