DS just turned 4 so can no longer be pasted as a terrible three (was a terrible two before that). He can be delightful but often isn't. Has just thrown DD's Tigger snowglobe down the stairs (apparently to see what happened - it smashed everywhere!) and I don't know how to make him understand that this is not acceptable and worse than pulling his sister's hair or scrapping with her or not sharing! Aaaaargh!