My 13 month old has been smacking everyone in the face, I have been sternly saying NO and putting him down on the floor. I mentioned it to health visitor and she recommend sternly saying No and putting him straight in play pen for 3 minutes, obviously no toys and everyone has to do the same as otherwise it won't work. Well he's been in there 9 times already today, screams and obviously hates it but how long before he realises why in putting him in there. I'm feeling guilty and totally overwhelmed.