U-Pump-It Heart Model

WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.

Make those biology textbook illustrations come to life with this clear, hard-plastic, 11" working model of the human heart, with clear tubing for veins and arteries. You assemble it in a hanging frame, fill it with water and the included red dye, and pump a little bulb to see the blood circulate through the heart chambers and back. If a picture is worth a thousand words, a working model is worth two thousand pictures.