But apparently front to back is so last month... and he won't do it anymore. Pretty much at all. Instead, he just gets upset!
Yep. We lay him down, he rolls over, he gets mad, we help him get back into position, and then the cycle immediately starts all over again. He loves to roll onto his stomach (in fact he does it almost as a reflex now... all the time!), but hates being there when he gets there. And he's not interested in continuing the roll to get back onto his back!
Did he forget what he used to do so well? Is it just too much to try to remember two fairly new skills at the same time? Or is he just so tired from all this new exercise his little body is getting?!?