Jigsaw Cookie Cutter
Jigsaw Cookie Cutter£4.00 from Cox & Cox
It would be cool to write a message across the cookies with frosting (or otherwise decorate them in an elaborate manner if you are extra ambitious), shuffle them up and give them to someone to put back together before devouring. I think I stole that idea from a jigsaw postcard I've seen, but this would be way more delicious.