Crib Craziness

Riddle me this: If two babies go to sleep in their own cribs, how did one baby manage to escape from his crib and CLIMB INTO HIS BROTHER'S CRIB? Nathan and I have no idea how Elliott did it. There is nothing to stand on and the crib is three feet off the ground. I guess the era of cribs is coming to an end with two Houdini babies on our hands!