A great thing about this project is it is JUST acrylic paint black Sharpies (love me some Sharpies) and scrap booking paper (Oh, and prepared canvases, Modge Podge and a Cricut machine) I think the last 3 items add a little cost - don't you wish schools had Cricuts? Ellison Machines just aren't the same but could do in a pinch.
Also on these boards
Summertime Art Project for Kids. Tissue Paper Collage. I love how simple yet colorful this project turned out.