He isn't sleeping, he is playing dead. It's his new trick. I asked him to pick up his toys and he collapsed on the floor. Apparently he believes if Mommy thinks he is dead he doesn't have to pick up his toys. He was completely unresponsive until I bought in the vacuum and threatened to just suck up all the toys on the floor. That sent him into a cleaning frenzy.
Fear is an excellent motivator for toddlers.