Where, oh where has my Clayton gone?

I can't turn my back for a second these days, without my little "Turbo" disappearing on me or getting into some kind of mischief. (Case in point - as I type, he is pulling apart a stack of post-it-notes, one at a time - now he's pulling his sister's hair.) The last couple of days, the second I pop my head in the laundry room to unload the dryer or some other task I try to accomplish during the day, he's off. But I've been able to locate him rather easily. His new favorite thing is to crawl as fast as he can to the room he shares with his sister, where he can have all the books on the shelf by Caroline's bed all to himself. He'll sit there for 5 or 10 minutes "reading" to himself. I could sit by the door and quietly watch him for hours. It's so cute to see him choose a book and turn the pages himself.