So far today, DD1 (3) has pulled a plant out of the garden (she does this most days), drawn on the coffee table, thrown my knitting about, and taken all of the photos out of a photo album.
She regularly pulls pages out of books, rips up CD inserts, draws on the carpet, etc.
We're in a new house, and have a lot of new furniture. Things don't look so new anymore. 
Is this typical for her age? What age should I put her in hibernation till?