My son will be 2 years old in August and he keeps trying to take off his diaper by himself. He'll lay down on his back or side on the floor while watching cartoons and things like that and try to get it off. He's in a size 4 diaper and they seem to fit perfectly. I'm not sure how to get him to keep it on or if this means we need to try something different like pull ups? We haven't started working on potty training but is this a sign we should start soon? If so, does anyone have any tips?