Spirograph in Excel

I was cruising around Jon Wittwer's Excel site today and ran across this cool Excel workbook that simulates the Spirograph set that you used to play with when you were a kid.

The workbook uses no macros. Simply enter the size of wheels to use and use the slider to select hole spacing. Very cool.

Download the workbook from http://www.vertex42.com/ExcelArticles/fun-with-excel.html