I usually put them in the shower with me (it is getting awful cramped in there with four of us though) they all sit / play on the floor while I stand up and shower. When I didn't / don't feel like having them all in with me, I make sure the baby is in the cot (so the others couldn't get him when he was little, and so he cann't get into anything else now he is bigger) and put the other kids in the lounge with toys and TV. I always leave the door open so I can hear any screaming (usually someone pulling someone else's hair).