Thanks to some friends who gave us a bike, Ab now has bike riding down! He worked and worked and worked. The first thing he'd say when he got up or when we got home "Can I go ride my bike?" In 2 days, he was flying down the neighbor's lane and I was flying out the door to go get him :) We do live back aways so there was no danger of the street, just danger of him busting his head open. No big crashes yet!