Well I have a few too. But the best (or is that worst?) was when DS1 was 2 1/2, and DS2 would have been 1. DS1 was going through a phase of pooing in his pants and then taking it out. Everything else I had tried wasn't working, so I tried not giving him any attention - not commenting, just cleaning up without a word. He decided to up the ante - he waited till I left the room for a couple of minutes, pooed, took it out and smeared it all over everything - walls, floor, toys, books and his brother!! When I walked in he said "look, sunscreen!" - and I burst into tears. The worst thing was the scale of it - and the fact that he'd smeared it on the bean bag I had just washed. It had literally taken hours to get all the beans out and back in again and there it was dirty again within a day