Sargent Art Tempera Cakes are a long-lasting and economical way to paint with temperas. Tempera Paint Cakes can be used to create beautiful works of art on paper, poster board, or any surface which accepts temperas. After dipping paint brush into clean water, stir paint brush on top of tempera cake to liquefy and activate pigments before painting. Stir more to add deeper color pigment and opacity. • Perfect for campgrounds, school, or home.• Long-lasting tempera cakes can be stored from year to year without freezing or drying out from extreme heat.• Easy-to-use teaching tool to help children learn about colors.• Great for mixing and blending colors.• Paint is reusable after drying on cakes.• Includes 9 tempera cakes in assorted colors.• Tempera cakes measure 2.25" x .75" .• Cleans up with soap. Not-toxic.