Really, She's Three?

Allie always asks me to write out words for her. She is constantly making cards for her friends, drawings for her dad, and letters to her Lola. One day she asked me to write out the words "NO" and "YES". I then noticed she had drawn corresponding happy and sad people. She then informed me that she was going to hang her paper on her door to inform people whether or not they could enter her room.

She's three. Pete, my twelve year-old does not even do that. She must have seen it on tv or something... that or it's the "girl" coming through...