My daughter, who has not yet had her first birthday, has effectively become a teenager. She has evidenced this by:
her desire to be tall and skinny,
being awake at all hours of the night,
refusing to eat,
refusing to take naps,
telling her parents "No" or "na" in her dictionary,
refusing to listen,
and definite PMS and mood swings.
In short, I miss my baby and am not at all looking forward to 14 years from now.