My daughter has been a little late to join to two wheel community. I was looking around for guidance to help her over the hump and tripped across this:
http://www.likeabikeusa.com/aboutlikeabike.aspx
I immediately went out and took the training wheels AND pedals off of her bike and told her push it through the house like a scooter. I'm thinking she'll be up and running on two wheels within a day or so now.