This afternoon we had to recreate the digestive system with the following things;  

 Then we started the process by pretending to eat the cracker and banana and we mixed it with the saliva (water) and gastric acid (orange juice) in the stomach. We then crushed this altogether as our stomach would. Then using a tight we poured the mixture into the small intestine and pushed it through extracting all the good nutrients.   

The last stage was to get the waste out of bodies! 

The children were disgusted by this stage, but they were also fascinated to know this how the digestive system worked!