We used the plastic bag for the mouth and stomach. We crunched up crackers and used scissors to bite banana into small chunks like the teeth would do. We poured some orange juice into the bag to represent bile then mushed up the banana to show how the acid would break down the banana. We added the liquid to a tight and pushed through like food moving through intestines. All of the water coming out is the nutrients going into the blood. We cut a hole into the tight and pushed out the solid mixture representing faeces.
We thought it was very gruesome but very fun to do. It really helped us to learn the words and remember what the organs do.
To understand how long our intestines are, we measured a piece of string to 8.2m which is the average length of an adults intestine. It stretched across our whole classroom! I’ve even chosen a book from the library about digestion because it’s so interesting.