“Rebecca the Stem Ambassador came into Hottsbridge Primary to work with each class. She was very good at explaining the water cycle to everyone and helping us to filter our own dirty water. In the dirty water there was: half a cup of tap water, a spoonful of vegetable oil and three spoonfuls of cocoa powder. We mixed the ingredients until it was nice and dirty looking! After, we were able to see how water can be filtered through the rocks in the ground using sand. It was lots of fun.”