R.G.
I have the opposite problem with my 3 yr. old son. He refuses to sit. Therefore, he is still pooping in his pull ups. He stands at the potty and pees so nicely. He watched Daddy go and wants to do the same. While I was teaching him, I just told him to make bubbles in the water. He thought that was really cool. I also cheered and clapped everytime he would go. Good luck! :)