Ds, 3.4 years, totally potty trained on the pee front, even wakes up in the night to go to the loo, but will only stand to go to the loo [in potty or when we are out in the loo] and refuses to sit down, which means he still only wants to poo in a nappy. He asks for a nappy when he wants a poo, does it, and then asks to be cleaned up, so the whole process takes about ten mins, and the rest of the time he is without a nappy and has been for a year. I don't want to push it, but I've bought him a lovely Winnie the Pooh loo seat to sit on, and he still refuses. What on earth can I do? He is about to start nursery a couple of mornings a week....