Kitchen Pantry Scientist Liz Heinecke has some easy natural recipes that are good for the environment and good for fun! 

Plaster of Paris Sidewalk Paint

(Make in a disposable container or large plastic bag. Plaster of Paris should not go down the drain!)

Mix together 1 cup plaster of Paris and 3/4 cup water. Pour into paper cups and add paint or food coloring. Pour into molds and allow to dry completely. 

Cornstarch Sidewalk Paint 

Mix equal parts cornstarch and water in a large plastic bag. Pour into paper cups and add paint or food coloring. Pour into molds and allow to dry completely. 

Sidewalk Frescos 

Mix 2 cups of cornstarch with 1 cup water. Mix well and pour onto baking sheet or sidewalk. Paint on the cornstarch with watercolor paints. 

Animal Footprint Casts

Add 1 cup Plaster of Paris to a plastic bag. When you find footprints in the mud or dirt, add 1/2 cup water to the Plaster of Paris and and pour the mixture into the footprints. Let dry until hard and no longer shiny before digging out the plaster casts.