A.P.
Ask if he would like to try, then drop it. *OR* let him sit on the potty while the water fills, then he can get in the tub (unless it makes him cry, then don't) Healthy children learn to go potty in their own time. With my last two boys, they were close to 4. Eeek--I know. But when they were ready, they just did it and never had an accident. No big deal. Hang in there!