Simple Sudoku Set

I want to teach my pre-schooler how to play sudoku so I designed this set. I have started with a 4x4 sudoku grid but the files include everything you need to go to a full sized set of 9x9.

If you want to run the script you will need to have write (http://www.thingiverse.com/thing:16193) in the same directory.

Can you solve the game in the picture?