How Much Longer?

How much longer is Boo going to play in his crib? He's moved from the cot to the crib for naptime. He used to be on a cot downstairs with the daycare kiddo, but I've been working on getting him in his crib more as that will work better with more daycare kids and having an infant around. He's actually done great with the transition. But today instead of sleeping he's been playing. My room with the computer is right next to his bedroom so I can hear him cracking himself up in there. I have the lullaby music on, which usually signals him to lay down and go to sleep and usually works. Hmmmm...go to sleep child!