We recieved this as a hand me down when my son was 7 months and really into standing up, he is now 10 months old. It is not sturdy enough for him to pull up on, he always pulls it down on himself. Currently it is in a corner in the play room with the wheels locked. My son does like to stand and play and push the buttons. Sometimes he pulls on it and falls backward because even in the locked postion the wheels move a little. I have unlocked the wheels a couple times but my son pushes the toy and it seems to go faster than him and he falls on his face. Maybe it will be better when he is a little older.