Operator?

Zoe loves talking on the phone! Before she just liked pushing the buttons, but now she actually holds it up to her ear and in a really high pitched voice says, " 'Lo?". I think we all almost fell over the first time we realized that was what she was doing! She walks around the house with the phone (or a remote control or a magnet or anything else shaped like a rectangle) pressed to her cheek and blabs in this sing songy voice. It is hilarious! Does this mean the teen years are coming early???!!!