It is so hard to leave them cry. I do think though that it is best if you do. I used to go in after an hour and get the child up and let them sit on the couch as long as they were quiet. I had 1 boy who was a terrible napper and only sleep 1 hour. I drove me nuts but he did sit quietly on the couch. I was glad though when they left a few months later. Now I leave all kids in their beds right until the end of nap no matter what. It was rough at the start and now it is good. They usually go back to sleep if they wake early