A molcajete is a stone mortar and pestle from Mexico. They're great for grinding spices and making salsa and guacamole because they give everything a nice coarse and rustic feel. I've never collected anything, but I think I might start collecting these because each one is decorated differently.
I work hard at that, but the fact that there are a lot of good songs means there are also a lot of really bad songs I've written that you never hear.