Make your own scratch art paper
My daughter loves art, but I lack the artistic bent. So gathering art supplies for working projects isn't my strong suit. But buying lots of shrink-wrapped "art kits" rubs me the wrong way...the creative process is most of the fun (and learning).
I love how Marisa of Make Happy not only figured out how to make scratch art paper for her kids, but turned the act of making it into a fun experiment and art project in and of itself.