My DS, is very placid most of the time, but thinks it is very funny to hit faces. I have tried saying no and I always put him down if he hits me when I'm cuddling him to try and make a point that it's not ok. At playgroup he will hit children and laugh but they obviously don't find this funny. I don't think he is spiteful, just exploring but I do want it to stop as it is just not acceptable behaviour especially when he is with other children. Any tips?