This makes a good outdoor painting project.
We watered down some tempera paints in spray bottles. We decided to mix yellow and red to make a reddish orange. Then we put out a large sheet of paper and sprayed the paint onto the paper.
We may have made ours a little too watery, but it’s really just trial and error to find the right amount so it’s liquidy enough to spray but not too watery that it makes the paper soggy.
Our finished product: