Here's my first attempt at 3-d modeling. The Banana slug is one of the most unusual creatures living in the Pacific Northwest (U.S.). Since my transplant here a decade ago, I am still amazed at how big they can get - up to 8 inches. I've made ceramic slugs and crocheted slugs, so a plastic one seemed like fun.
Be careful of the eye stalks, they can break off. The slug in the photo has one eye stalk repaired with hot glue. I modified the file to include a wider base for the eye stalks, but have not printed this version. (I don't have a Makerbot, but I used one at Metrix Creat: Space in Seattle)
Note: Revised slug with thinner/neater optical stalks. Cleaned up the mesh.