I hope this person doesn't think these are rocks, becauce they are not. They are glass.creepy cool craft idea - paint eyeball rocks normally I don't "get" the whole painted rocks thing for anyone over the age of, say, 9 years.
Or a mystical/gypsy/witchy vibe - maybe even hire a fortune teller? Every good witch or wizard needs a fine set of apothecary labels for some playful Halloween decorations. Here is a set that will keep your potion making ingredients in order