Artist Trading Cards (ATC's)

I Just came across a fun new concept, which apparently everyone else already knows about, but isn't doing... Artist Trading Cards, or "ATC's." draw 'em, trade 'em, sounds fun! Any medium, any material, any what-which-way about it. The only rule: it has to be 2.5 by 3.5 inch in size (same as baseball cards). I found the cards at Prism on the northside and worked one up tonight at Josh and I's co-hosted every-other-wednesday "Art Night." Here it is:

Here's a scan of the piece next to the packaging, and a quarter for scale:

Wikipedia's entry about ATC's.