My DS is 2.5 and still In nappies, he is quite delayed with his development and don't think he's really ready as he doesn't really understand questions and doesn't answer with a yes or no. The HV said I should make a start with it but really don't know where to start because if I ask him if he needs a wee I don't think he actually understands, he's had a couple wees on the potty previously but now won't even sit on it.
Any advice from people with similar problems?