Jackson is constantly pushing Clayton's chair these days. (Yes, he is quite strong enough to move it while Clayton is in it!) At home, it gets a little dangerous since Clayton tends to go in circles on his own and Jackson can't get out of the way fast enough, but when we were at the park the other day, they seemed to actually be working together at moving the chair forward! It's definitely interesting and comforting watching this part of their relationship unfold.
The only problem seems to be when Jackson puts the brakes on and can't figure out how to get them moving again!