I've been using paper and clays set against a backstop mostly. I was getting a little bored when I saw an ad for a pinwheel type that held replacable "clays". turns out these clays are pretty expensive soI came up with my own contraption.I made it out of stuff I had laying around and it can hold regular 'inexpensive" clays.

http://s298.photobucket.com/albums/mm259/TripleA_Shooter/?action=view&current=Target.flv