We had a gate in the door to my son's room, but were lucky once he could climb over that he'd come to our room and wake me up!

OH wait! The one morning when I woke up, he wasn't in his room. Went downstairs and there he sat in the recliner watching TV. It was on the Weather Channel or something his Dad was watching the night before, and he couldn't figure out how to change the channel. It was pretty funny to see him sitting there intently watching that!
I've heard stories of people waking up and finding things all over the house. One of my sister's friends daughter pulled a bunch of things out of the refrigerator and dumped it all over the kitchen!

If I ever woke up to that, I think I'd install a motion detector in their room!!!