--- title: "Year 4's Disgustingly Brilliant Science Experiment!" url: "https://trawden.lancs.sch.uk/news/2025-06-03-year-4-s-disgustingly-brilliant-science-experiment" school: "Trawden Forest Primary School" --- # Year 4's Disgustingly Brilliant Science Experiment! ![Image of Year 4's Disgustingly Brilliant Science Experiment!](https://files.schudio.com/trawden-forest-primary-school-2/images/news/IMG_2114.JPG) 3 June 2025 Today, Year 4 kicked off their brand-new Science unit, *Animals Including Humans*, with an unforgettable (and slightly gross!) hands-on experiment to explore the **digestive system**. To help us understand how our bodies break down food, Mr Loynds introduced what may just be the most revolting - but also the most memorable - experiment we’ve ever done in the classroom. The aim? To build a working model of the human digestive system... using real food! The process began with some “chewing”: we crushed up biscuits and bananas to represent the start of digestion in the mouth. Once our mixture was ready, it was placed into a plastic bag (our "stomach"), where pineapple juice was added to act as stomach acid. The bag was sealed, squished, and mixed thoroughly - just like food in your tummy! After leaving our stomach mixtures to “digest” over playtime, things got even messier. We cut a hole in the corner of each bag and squeezed the contents into a pair of tights to represent the intestines. This part of the experiment involved pushing out all the nutritious liquid (absorbed nutrients) into a bowl, mimicking what our real intestines do. And finally… the grand finale. We cut open the tights to reveal the final waste product - poo! By this stage, the classroom was filled with a very *unique* smell and a mix of wide-eyed fascination and scrunched-up noses. This messy, memorable activity wasn’t just for laughs - it gave everyone a fantastic insight into how our digestive system works, from start to finish. [Science](https://trawden.lancs.sch.uk/news/tag/science) [Class of 2027](https://trawden.lancs.sch.uk/news/tag/class-of-2027) [ Friendship in Bloom - May 2025](https://trawden.lancs.sch.uk/news/2025-05-23-friendship-in-bloom-may-2025) [EYFS have started their holidays! ](https://trawden.lancs.sch.uk/news/2025-06-05-eyfs-have-started-their-holidays) ### School News - [Calendar](https://trawden.lancs.sch.uk/calendar) - [Events](https://trawden.lancs.sch.uk/events) - [Facebook](https://www.facebook.com/Trawden-Forest-Primary-School-2044364025884936) - [Instagram](https://www.instagram.com/trawdenforestprimary/) - [News](https://trawden.lancs.sch.uk/news) - [Newsletters](https://trawden.lancs.sch.uk/school-news/newsletters) ![Trawden Forest Primary School](https://files.schudio.com/trawden-forest-primary-school-2/images/logo/Untitled_design.png) #### Trawden Forest Primary School Dean Street Trawden Lancashire BB8 8RN (01282) 865242 #### Useful Links - [Contact Us](https://trawden.lancs.sch.uk/contact) - [Term Dates](https://trawden.lancs.sch.uk/parents/term-dates) - [Absence Reporting](https://trawden.lancs.sch.uk/absence-reporting) - [Calendar](https://trawden.lancs.sch.uk/calendar) - [Job Vacancies](https://trawden.lancs.sch.uk/job-vacancies) #### Social Media - [Facebook](https://www.facebook.com/Trawden-Forest-Primary-School-2044364025884936) - [Instagram](https://www.instagram.com/trawdenforestprimary/) © Copyright 2025–2026 Trawden Forest Primary School School & Trust Websites by [ ![Schudio logo](https://trawden.lancs.sch.uk/img/logo/light.png) ](https://www.schudio.com/)