Just Wait Until I'm 5!!

Michael had just an excessive amount of energy on day, and Mommy decided to bake cookies with Michael because he loves to bake.  Mommy and I were discussing this excessive level of energy, and I walked up to Michael and semi-whispered in his ear "Just wait until you're 30!" This didn't seem to faze Michael at all because in just a split second he shot back "Just wait until I'm 5!!"  Mommy and I burst out laughing because it was just hilarious, and Michael seemed to be surprised and was wondering what was so funny.