Sudoku

[vicmarion]

Does anyone remember Sudoku, I have one of the originals which i was going to introduce to my great grandaughter but of course the pens have long since dried out and we cant find any replacements, does anybody know where they can be found? Many thanks if you can.

[puternut]

Can I show my ignorance and ask what was special about the pens?

I have been doing sodoku for years in papers and magazines and just used a bog-standard 10p biro??