I have several:
Each one of them means something to me. It's the stuff I stare off into space at. Sometimes I pick them up or touch them (I'm a fairly tactile person). You can tell I have a predilection for birds. I'm probably going to have to buy more, since I can no longer get the double-window, dual-birdfeeder view like I could at my old office. Something about watching them interact has always helped keep my brain functioning. They were my real totems, I guess... *sigh*
So what about you? What are your little desk inhabitors?