Let’s pump it up (and out)! See how your heart pumps blood throughout your body with this at-home experiment – try it for yourself below! 👇 What you need: 3 cups or jars 2 balloons 2 clear straws 1 bendy straw Water Red food coloring Scissors Tape How to make a pumping heart: 1. Fill one of the cups about ¾ full with water and add 5 drops of red food coloring. 2. Cut the neck off of two balloons. Then, tape the cut end of each balloon neck closed. 3. Cut a very small slit (big enough to insert a straw) in the neck of each balloon about ½ inch below where you taped. Then, insert a clear straw into the slit of one balloon. Set the other balloon neck aside. 4. Cut the bendy straw so that there is about 1 ½ inches of straw on either side of the bend. Then, cut the other clear straw in half. 5. Tape the bendy straw in between the two half-length straws. 6. Cut two small slits directly across from one another near the top of one of the balloon tops. 7. Insert the long straw and the bendy...