Getting a Baby Who Can Go Vertical to Stay Horizontal

Our latest problem with nap time is how to get a little guy who can stand up to lay down and fall asleep. When we put him in his crib now for a nap, there is inevitably a lot of angry crying at the injustice of it all, and then we will look on the video monitor and notice that we can't see him because he is standing up in the corner of his crib, demanding to be released from jail. As you can see from the photo, getting the artsy crib that dips lower in the front than in the back was not a good idea--it looks to me like he should be able to escape from jail here pretty soon, since his head and shoulders are already above the rails.