Mrs. Banana!
My children love it when I put a surprise underneath their pillows. Most of the time it's a bribe to get the to go to sleep fast. I quickly run out of ideas, I don't like candy or toys for the prize, and I am sure they are tired of my sketches and notes. I am very proud of my MRS. BANANA idea! All you need is a permanent marker and a banana...well, Hazel was impressed.