A mold for the stanford bunny. This mold include inclusions so it's only for casting material that is at least a little flexible. I used Oogoo an opensource rubbery material made from silicon caulking and corn starch. You can find the recipe here: http://www.instructables.com/id/How-To-Make-Your-Own-Sugru-Substitute/ Oogoo sets in less than 10 minutes, and is cheap and easy to make from stuff you can by locally. Give it a try!