We tried to take a nap in the big boy bed today. The second I laid him down on it he started balling and freaking out. I ended up having to take the mattress off and put it back into his crib and he slept there! I'm gonna try again tomorrow and I hope it works. I think part of the reason he wouldn't today was because he was actually overly tired and had been throwing fits and crying for no reason ALL day! Hopefully tomorrow will go a little better. Wish us luck...I think we're gonna need it.