Let me paint you a picture (..God I'm funny)
We're camping. Beautiful setting with the trees and the birdsong, bubbling creek... how nice would it be to sit there and soak up the serenity while letting my creativity flow with some paints, and I don't know, paint a tree or something.
Now there are some kids around, which I expected, so I brought some supplies (read: my painting dregs I wanted to get rid of) for them to defile while I have a nice moment with the serenity.