This idea is from http://www.theartistwoman.blogspot.com/ . You paint the background with acrylic or tempera paint (you can water down the paint or not). We chose not to water down our paint, instead we watered our brush a little and swirled it over our paper. Let it dry, then using a straw blow your black paint (really watered down) to make your tree and branches.
Lauren-5, Hannah-8, Micah-3
I loved their work so much we hung them in the entry way.