He's just not interested. Turned 3 just before January. Nursery also try. He'll bring me his mat and nappy and tell me to change him. Wasn't happy about being put in pulls ups. Sticker charts and bribery doesn't seem to be working. We read potty training books and watch cartoons on youtube. He'll move into the preschool room in April. Hoping if he sees none of the older kids using a nappy might encourage him. Any other late developers?