--- title: "Science in Year 4" url: "https://www.stbarnabasdarwen.co.uk/news/2026-11-10-science-in-year-4" school: "St Barnabas Primary School, A Church of England Academy" --- We are holding a number of open days for children due to start primary school in September 2027. Please see our admissions page for further details. Everyone welcome! # Science in Year 4 ![](https://files.schudio.com/st-barnabas-primary-school/images/news/IMG_4642.jpeg) 10 November 2026 We had a fantastically messy science lesson this afternoon which involved making a physical version of the digestive system. We had a ‘recipe’ which we followed carefully: Step-by-Step Instructions 1\. Breaking Down the Food (Mouth & Teeth) \* Place the banana, cracker, and baked beans into a bowl. \* Add a little water to represent saliva. 2\. The Stomach Churn \* Pour the mashed food mixture into a sealable plastic bag (this represents the stomach). 3\. Nutrient Absorption (Small Intestine) \* Cut one leg off the pair of tights. \* Carefully cut a corner of the plastic bag and pour the food soup into the top of the tights leg, holding it over a bowl. \* Gently squeeze and massage the tights over the bowl. 4\. Making Waste (Large Intestine & Rectum/Anus) \* Keep squeezing the tights until most of the liquid is gone. \* Cut a small hole at the bottom of the tights. \* Squeeze the remaining solid waste out onto a tray or into a cup to demonstrate how the large intestine and rectum/anus eliminate waste. The question is ‘Who created the best poo? ‘ ![](https://www.stbarnabasdarwen.co.uk/images/news/IMG_4642.jpeg) [Year 4](https://www.stbarnabasdarwen.co.uk/news/tag/year-4) [Science](https://www.stbarnabasdarwen.co.uk/news/tag/science) [![](https://files.schudio.com/st-barnabas-primary-school/imagecache/100x100c/news/IMG_5252.jpeg)](https://www.stbarnabasdarwen.co.uk/news/2026-11-09-year-5-big-barney-s-assault-course) Previous ### [Year 5 - Big Barney’s Assault Course](https://www.stbarnabasdarwen.co.uk/news/2026-11-09-year-5-big-barney-s-assault-course) ### Personal Development - [News](https://www.stbarnabasdarwen.co.uk/news) - [Events](https://www.stbarnabasdarwen.co.uk/events) - [Photo Gallery](https://www.stbarnabasdarwen.co.uk/photo-gallery-category/our-gallery) - [Calendar](https://www.stbarnabasdarwen.co.uk/calendar) - [School Council](https://www.stbarnabasdarwen.co.uk/academy-life/school-council) - [Attendance](https://www.stbarnabasdarwen.co.uk/academy-life/attendance) - [Fundraising](https://www.stbarnabasdarwen.co.uk/academy-life/fundraising) - [Extra Curricular Clubs](https://www.stbarnabasdarwen.co.uk/academy-life/clubs) - [Little Leaders](https://www.stbarnabasdarwen.co.uk/academy-life/little-leaders) - [Visits and Visitors](https://www.stbarnabasdarwen.co.uk/visits-and-visitors) - [British Values](https://www.stbarnabasdarwen.co.uk/british-values) - [Protected Characteristics](https://www.stbarnabasdarwen.co.uk/protected-characteristics) ##### Location Knowlesly Road Darwen Lancashire BB3 2JA ##### Contact Us 01254 702996 ##### Stay Connected - [Facebook](https://www.facebook.com/stbarnabasce/) - [X](https://twitter.com/stbarnabasce) © Copyright 2021–2026 St Barnabas Primary School, A Church of England Academy School & Trust Websites by [ ![Schudio logo](https://www.stbarnabasdarwen.co.uk/img/logo/light.png) ](https://www.schudio.com/)