When is one of the big "games" manufacturers going to produce a magnetic board and numbers so that the same board (perhaps with a wipeclean surface) can be used over and over again and so save us using forests worth of trees for drawing out grids.
If anyone takes up this idea, can I have a cut of the profits? or at least a free board.
The simplest solution would be to print/draw your own grid and run it through a laminator to give your wipe clean surface and use a dry-erase marker pen.
As someone who always ends up with tons of pen marks when i'm trying to solve a sudoku puzzle, these dry wipe boards seem a really good idea and the purple one looks great.