* A-Z Challenge: X

This image is the original icon for most alphabet charts until the last 5 to 10 years, apart from Xylophone.  Some folks have realized that very few kindergarten and first grade words start with X.  Many alphabet charts today depict an X at the end of a word, with foX and boX competing for first place.  And yes, this is my foot, which now glows in the dark from so many X-rays!