DS is 3yrs and 3 months old. We know he is fully aware of when he is about to wee and poo because he tells us that he's going to do a poo now etc.
We have tried all sorts of encouragement to go to the potty or use his special toilet seat but he is absolutely adamant that he has a nappy on at all times and will rarely sit on the potty or toilet. If we take his nappy off and pretend that we have forgotten to put another one on he will scream and cry until he gets a nappy on.
Stickers, lollies and even new toys have zero impact. We are thinking of just telling him the shops have run out of nappies and saying that he has to either wear undies or nothing. Is this too harsh? Should we go down this track or just keep him in nappies? Also he screams and tantrums if we try to put undies on him or even pull ups. I have even bought his 11 month old sister pull ups to show DS that he can wear pull ups too. He still refuses and screams that he needs a nappy.