My son turned 3 years old in April and does not show any interest in potty training. It's not that he doesn't know what to do (he does). I couldn't tell you the number of stickers he has peed for. The problem is that I have a hard time getting him in the bathroom. Once he's in there, then he goes. I have tried everything from doing nothing to getting mad at him and nothing seems to work. Any suggestions? He is signed up for preschool in August and cannot go if this is not done!