Okay, maybe discipline is too strong a word but what do you do to make them stop doing something that is dangerous? DS is currently rather fond of hitting a glass topped standing lamp against the wall, as well as hitting the glass front of a cabinet. Both of these scare me stupid - if the glass smashed, he'd be a very hurt wee boy. He knows it is not allowed, but thinks it's hilarous. Anyone got any ideas for what I can do, apart from removing said objects (not easy!)