The children were recreating the digestive system. They mushed up food, as the stomach would and mixed water and acids in to create soup or chyme. Then the food was transferred to a pair of tights, which was like the small intestine. The runny food escaped from the tights, as the nutrients would have been absorbed into the blood stream. We copied off the large intestine by applying paper towels and taking away all of the water and salts. In the end, we were left with waste which we squeezed out through a small hole we had cut in the tights.