Today, I put Diego down for tummy time and he rolled over right away. Then after awhile he rolled over onto his stomach again. After another awhile he rolled onto his back again! Pretty soon he's gonna be rolling across the room.
It's touchy because I have to leave him alone long enough to motivate him to get moving but if he isn't in the right mood he'll throw a fit. It is scary for me when he screams and thrashes around like that so I have to find the right time of day to let him get motivated. Usually, the best time is first thing in the morning.