We have started this topic by learning about the teeth first. We looked at the different types of teeth and their functions and why it is important to take good care of them. To investigate what happens when teeth are exposed to certain substances over a period of time, we carried out an experiment using eggs. The shell of the egg acted as the enamel of the teeth. We used: coca cola, energy drinks, fruit juice, coffee, vinegar and water. We were amazed by the results and it has really made us think about the importance of looking after our teeth!