LOL! My DS has always had the same problem. It was not a comforting thought when I was pg and the doc asked if big heads run in the family!

We used to joke when he was a baby before we knew he was at all gifted (I called him Charlie Brown) that his head must be full of brains. MIL jokes it's a good thing he has a big, hard head cause he bangs it into stuff pretty often! It's better now that he's older, we just get adult size hats.