V.F.
I'm in the same boat as many of the other respondents. My son had a race car bed, and it just wasn't big enough. He'd role over, bump his head/leg/etc., and wake up. We moved him to a bigger bed and he is much more comfortable. HOWEVER - when you make the transition, don't make the same mistake we did and lie with him in the big bed. That just created a whole other issue. Instead, tell him it's his big-boy bed and he should sleep in it, just as his sister sleeps in hers. Good luck!