Tummy Time

So, Rowan has learned to roll over, well sort of. He goes from his back to his tummy, plays for a while, then gets stuck. He can't seem to roll back! This really frustrates him and he cries. I've let him cry a little hoping he'll figure it out and roll back, but he gets so frustrated he finally buries his face in the floor and gives up! I'm sure he'll get it one of these days... silly boy.