My son is 2 1/2 and I could hear him kicking around in his crib for about an hour at nap time. I was trying to take a nap myself and all of a sudden I heard a loud thud and then screaming. Sure enough, he tried to climb out and did a flip out of his crib. I guess this is our cue to take the rails off and let him try a big boy bed. I am very nervous for what this night will bring. I have very low expectations that he will actually stay in his bed.