My son is 2 and a half and I know he is more than ready for potty training because we had him telling us and using the potty then we tried to move on to the big toilet and use a start chart and that worked for a bit, but then all of a sudden he stopped and just started doing his business where he pleased and quite often he will just walk right up to us and wee on our legs or poo on the floor right in front of us. Can anyone say whther we should be punishing him or what i am totally stumped