1 container of Cool-Whip
food color of choice
Mix food color and Cool Whip together.
Don't add too much color or it will be runny.
Do not stir much or the Cool Whip will break down.
Paint with mixture on heavy paper.
Finger painting paper is great for this.
When it dries flat on a surface, you have 3-D art.
(Source: "Recipes for Fun" - handmade booklet purchased from thrift store)