This little guy is a Houdini! No matter how low the mattress in the crib is – he finds a way to climb out like Spider-Man! Then you hear rambling around in the room from the baby monitor. It took only one time for him to scare the sh** out me, in the middle of the night, as he came bolting out of his room into ours to get this mesh cage/mosquito net. Granted no mosquitoes here – so baby mesh cage. It works well!! Now nap times aren’t hop out and explore times!!