Creative Ideas For Ab Shells

I have several buckets of complete ab shells and another bucket of ab pieces, any ideas to use them besides nailing them to a fence? 

I used to carve names and designs through the shell using a dremel tool.
Because the dust is toxic, I made a container that looked like an automotive parts washer.
I think it was an 18 gallon Rubbermaid tub with two holes on one side that were just round enough to get my hands into up to mid forearm while wearing rubber gloves. I used a plexiglass cover held down with spring clamps.
One small hole to accomodate an extension cord to plug in the Dremel and a 6' section of rope lights coiled up aound the inside.
I also wore a respirator while I worked.
It made for some very unique Xmas presents that are still on friends shelves and mantles 10 years later.