Age 4+ Explore the inner workings of the human body with our unique paint sheets. Drip paint over the “blank” sheets and brush or wipe to reveal details of 6 different organ systems, including muscles, bones, nerves, digestion, circulation and respiration. Made from sustainable paper. Check out our instructional video.Includes: 150 sheets/25 booklets, 3¾ x 7¼” (9.5 x 18.5 cm).