[quote="newtooth"]is a numbers game where you try to make 9 horizontal and 9 vertical lines blocked into 9 squares of 9 numbers in each box without any number being repeated in any line or any box. Here is an adaptation on that idea which substitutes colored balls for numbers.
http://www.instructables.com/id/Rainbow ... dium=email[/quote]
Our news paper publishes a puzzle that I work every morning. I also play SUDOKU on the computer and have books of them I carry when traveling.
I think this project might be a good idea for some people but, I don't need one with a bunch of parts to it. I some times loose my ball point pen as it is. LOL