Yesterday my 8 yr old daughter and I tried an abstract art project called Kandinsky Oil Pastel Circles from Art Projects for Kids. After searching for a box of oil pastels I was sure we had, we opted to modify the project and use Caran D'Ache Neocolor II wax crayons. These are in between crayons and pastels. I cut drawing paper into 2.5 x 3" rectangles and we each drew rough concentric circles inside. We started at the center and moved out, trying to go quickly and not worry about the shape or color combinations. I then attached these to an 11 x 14" sheet of drawing paper in a grid format. They look very abstract with different styles and overall a very cool project.
We might frame these, or try different color combinations or extending the circles to the edges of the paper rectangles.