This art project is easy to set-up and uses simple supplies that you might already have handy — just spray bottles (clear is best so children can see the colors inside), food coloring, and construction paper. Encourage children to collect a variety of natural items for this activity, such as rocks, twigs, sticks, and leaves. Mix water and food coloring in spray bottles and shake. Then, invite children to spray their paint on the paper, over the various materials to see what kinds of shapes are left on the paper.
Older children might enjoy making hypotheses about what the paper will look like after spraying, and which items will resist the spray paint.
Click here to find more information about setting up this activity.