I'm posting this right away because I've been searching for *years* for something that would do this, and I finally found a solution. I like random generators. I especially like them when they're art related. I also was hoping to find a big giant list of possible art materials, or just materials in general that can be used to make stuff. So anyway, I made this link to access random items from Boston Museum of Fine Art's CAMEO art materials database: http://cameo.mfa.org/wiki/special:random
If this helps anyone out there, let me know.