OK I'm probably going to get a roasting for this. My 2.9 son has recently started slinking out of bed, downstairs and by the time I wake up is in front of the telly having got himself a cup of water (chair pulled up to sink) and helped himself to yoghurt and fruit. He is doing it very stealthily as our room is next to his and I've left our door open to hear him but he sometimes managed to get past my radar. I am tempted to leave his cereal out and let him have a full breakfast. When do you let them do this? He's very careful, very rarely spills anything, completely capable of getting milk, pouring it out and putting it back again and shutting door (miles better than DH in fact.)