I recently posted about our three year old not being potty trained. Well now he is almost 4. Not even peeing in the potty. Tried everything, books, songs, DvDs, treats, stickers, picking out his own potty, putting his favorite stuffed animal on it and saying he goes etc. Nothing. He is an only child and plus no male in the house it's a loss. He is on the biggest and last size of diapers. Preschools now won't take him because he isn't trained yet he needs other boys to show him. This is impossable. Help.