Previous articles in "Primary Science" have presented a range of ways to teach electricity in engaging and informative ways (e.g. Buckley and Harvey, 2014; Chapman, 2014; Norman, 2014; CLEAPSS, 2016) and Frank Harris provides an interesting historical account of the development and use of batteries in "School Science Review" (Harris, 2019). This article builds on these earlier articles by showing how the well-known fruit-and-vegetable battery experiment can provide an effective platform from which children can work scientifically. Examples of work from year 4 (ages 8-9) and year 6 (age 10-11) children demonstrate how outcomes are naturally differentiated.