Oh if only mine did that.... He's 3 and a bit and has never stopped crying when I leave him. Having said that, his first nursery shut down at short notice, then he was caught up in the Bojangles shut down. Now he still puts on a traumatic drama, but I'm getting the sneaking suspicion that's it's all an act specially put on for mummy. He's always been having a great time when I pick him up. I reckon they pick up on your distress, and in the case of my one, he rather likes the dramatic attention.