My 2 year old told me to come there (I was changing into PJ's) so I walked over and she had this serious look on her face. She said, mommy, your belly button is popping out, let me fix it...and proceeded to try to pinch it and push it back in lol. This was the other day, now when she eats a lot and feels full, she checks her belly button to make sure it didn't pop out lol.