My 3yr old ds(autistic with no speech & not sure how much understanding of the world)has been given a potty chair by his OT but I have no idea how to get him to understand what its for.He will sit on it for a short while,we've just put it near the sofa so he gets used to it being here,but then wanders off & just pees where ever hes stood.We've tried picking him up mid wee & running over to it saying "wee wee in potty" & even had his brother use it while he watched but hes just none the wiser to it.Hes quite "in his own little world" most of the time so its not easy teaching him things.Hes fed up of his nappies now though cos hes constantly pulling at it & moaning & plays happilly when its removed.Has anyone else been through this & succeeded???