A jigsaw that is :O)
Been bored today (off work as the mother-in-law is visiting) and messing about with a bit of Jigsaw Puzzle software, you can create them from any picture and tweak the difficulty etc. It's latest release allows you to distribute puzzles in .exe form.
Anyone who's interested can download a submarine one from here:
http://myweb.tiscali.co.uk/lesrae/gash/sub.exe
There are some limitations, you can't save your progress and a lot of features of the full program are missing, but it's a bit of fun. If you want one made from a picture you've got then post the pic here.