Charlie does this, and it's soooo helpful! I can't remember when he started doing it, but Olive is 9 months (unadjusted) and she doesn't do it when I dress her. It makes changing her so much harder! I always worry about breaking her fingers as I snake her fingers through her sleeves!

Does your LO help you get their arms through their sleeves when you dress them? How old were they when they started helping you change their clothes?