Cutting out and Drawing Circles - a neat way to practice practice practice but putting it towards a tangible activity - the process is the main goal yet they are involved in the product - what kinds of cool trees, rain/snow, colours, etc will the kids create? - Spring Blossoms. (Idea - Kandinsky Trees).
1st Grade sunflower painting Megan Hopkins Church so many fun things to do on black paper. Maybe your art journals could be black colored on with pastels or something