The 3-D working plastic heart model with clear chambers from Edu-Science is a fantastic tool to learn about the heart and the way in which it works. The squeeze bulb pumps simulated blood through clear heart chambers imitating the way in which our hearts function - a hands-on approach to learning our biology. Easy to assemble Age: 8 Years + What's in the box Heart Model - Display Stand - Instruction Manual - Acrylic Paints & Paint Brush