Thanks again for all the nice comments. I feel like I accomplished something! (Okay, I guess I actually did.) You guys are great motivation for finishing projects, I tell ya!
Jan, I called this a "3D project" because . . . okay, because I'm weird.
It's because I often think of knitting and crocheting in terms of geometry (and I was an English major and so not into math, so this is probably really really corny!): I think of the yarn as a line; any knitted or crocheted flat piece (such as an afghan, a swatch, or a knit or crocheted flat section of a garment) as the plane; and a garment, stuffed toy, etc. as a three dimensional object!