Perpetual Calendar - An Excel spreadsheet that will display the calendar for any year A.D. Just type the year in Cell A1, and the rest is automatic.

Categories Game - An Excel spreadsheet that creates game cards inspired by Milton Bradley's game called Scattergories.

Excel Maze - An Excel spreadsheet that will create randomly-generated mazes.

Carved Eggs - Intricately carved eggshells, including 3-D relief images.  Truly amazing!