Hi,
I posted this as part of another topic but thought others may find these useful and cute.
They are basically large sandwich cutters in a variety of shapes with a minimum of bread wastage.
http://www.lunchpunch.com.au/startpage.htm
Got mine today (jigsaw ones) and they work quite well… I think the puzzle one would be great using sheets of biscuit instead of bread to make a giant puzzle too.