It's funny, my 3rd child, on the few occasions she is silent and out of sight, is generally being exceptionally well behaved. She has common sense beyond her years. Just an extreme need to communicate about all things ALL the time. #2 though, was miss re-arrange the furniture to make a ladder, within moments of entering a new space. I lost track of the "Wow, no kid's ever done/found THAT before!" comments... Silence was always dangerous with her.