Grebes have loved investigating melting points this week, heating various substances and recording the temperature at which each began to melt. Cheese, butter, dark/white/milk chocolate, gummy bears – we melted it all. Children were able to reflect on the results of the investigation and why the first attempt was not a scientifically rigorous fair test – for example, some groups had the heat source further away from the substances being melted, and some had the thermometer in different positions. They have worked together to plan a repeat experiment with variables under strict control.