Based off of those wooden dino skeleton "puzzles", easily available from the likes of eBay. I'd punch out the pieces, then take a picture of the leftover "waste"... convert that picture to high contrast, trace lines in Gimp and make a cleaned up bitmap and printed it out in MS Paint over several sheets of paper. Pieced these together with tape and cut them out then laid them out on foamboard (foam coreboard).
Here's Stumpy (nicknamed that because the design and accompanying photo made him look quite short & stout):
and Pterri, who now hangs from the ceiling of London Hackspace