Bees are amazing animals, my family has six beehives that give us honey. Here is a cool project where bees make objects in molds with their wax. It is organic all natural 3d printing process which bees perfected over millennia of evolution.
by:
https://www.youtube.com/user/DewarsUS?feature=watch
Update:
here is 3d printing with beeswax extruder project:
http://diy3dprinting.blogspot.com/2014/01/3d-printing-with-beeswax.html