I was playing around in Alibre Design and came up with this thing. I think it might be an eyeball monster. I've included small and big version STLs as well.

I tried to color part of the eye using a blue sharpie but it bled horizontally because of the layers. So I ended up just coloring the whole thing :). Maybe paint would work better?

Dimensions: Small   37.5mm x 34.0mm x 47.1mm tall Regular 50.0mm x 45.3mm x 62.8mm tall Large   75.0mm x 67.0mm x 94.1mm tall