My son rolled over tonight! He's 4 and a half months old and doesn't really like spending time on his tummy, so I had figured it would be a while before he was fully rolling. But tonight, laying in his gym, he threw his feet around, and the rest of his body followed! One arm stayed underneath him so he was able to flip himself over without problem. The biggest part of this story is that I almost missed it. I had my back to him, and if my husband hadn't spotted it, it would have gone completely unnoticed.