So after some research we settled on a potato. Apparently, potatoes decompose much like people do, only faster, smaller, and cleaner. So we cut a person shape from a potato and set him in a container of salt and baking soda for 2 weeks to decompose. The funny thing was Z insisted on putting him in a sarcophagus and tucked the rotting container deep into the bowels of the closet for the proper mood.

We got him out 2 weeks later and Zach started to wrap him up.

Then with a lovely coffin from the craft store painted by Z, we laid our friend to eternal peace in the afterlife. Or rather to temporary stinking of our life on the boat.
The boy LOVES his mummy. He brings it everywhere to show to people. He's named him "King Jones". Right now the mummy lives in the salon on the nature table with all of our fall/ Halloween stuff. I am hoping I can secretly do away with him by Thanksgiving. ;)

If you want to try this at home, check out the instructions we followed in DIG MAGAZINE.
page 28