As part of British Science Week, children created Sundials.  They learnt that a sundial works by using the sun’s light to create shadows and most have a ‘gnomon’ – a thin rod that will cast a shadow onto a flat plate. The Earth is constantly rotating on its axis, which means the position of the Sun appears to change in the sky throughout the day. The position of shadows, therefore, also changes throughout the day and, by tracking them, we can measure the passing of time.