My son turned 2 this June. He's doing pretty well potty training if I really stay in top of it. The issue is he can't pull down his own pants yet. He also isn't really great at getting himself sat in the potty. So I usually pull everything off and sit him in there and he goes. He gets up fine, but then I have to help him out everything back on. Is that normal or should he be able to pull down his own pants and underwear or pull up by now? Any tips for me?