Vaughn I think they should make you a National Treasure!
I can easily see how a person could become a nail polish collector; especially a person with really good color vision. I don't know if that is what she is doing but the thought sure gave me an instant shift in my perception of nail polish. Heck, one of my dearest friends collected Gofer match covers for decades. (Even if he was still alive he sure wouldn't be finding any now.) And I don't think that is even remotely as interesting as nail polish colors, bottles, textures, etc.
The variety of things that interest humans amazes me: all of the way from bug collecting to woodworking to building their own jet airplane---Hey it is a wonderful world!
Tell your daughter I said, "Hi and to have fun."
Enjoy,
JimB