Daniel is walking...well sort of..

This is Daniel walking for the first time,at my parents house. We knew he knew how to do it by himself,he just wouldn't do it . It seems that when he is holding a ball,or going to get one, he feels secure enough to let go and walk,but that's it, if you take the ball away, or he is in any other situation,it seems he forgets that he knows how to do it, he will just drop on the floor and
crawl!