Willow Class was set the science challenge of find the best thermal insulator for the chocolate river from Willy Wonka’s factory.
The river keeps slowing down and setting, meaning the boats can’t get around and it isn’t getting mixed as Willy Wonka would like.
The children set up an experiment to test if foil, newspaper, cushion filling, cotton wool or bubble wrap should be added to the banks and river bed.
The temperature of the chocolate river was taken every 5 minutes. The independent variable was the material.
The children found that the cushion filling was the best thermal insulator followed by newspaper (think hot fish and chips!).
The experiment was finished off with Charlie writing a postcard to Grandma Josephine.