We experimented with egg shells (which are similar to teeth enamel) to see which drinks damaged tooth enamel the most. Our investigation showed that coke and apple juice damaged the egg shell the most. Tea made it change colour and lemonade had least affect. We also learnt about what we can do to keep our teeth in good condition. We have now started our daily teeth brushing in school; the children are doing well and we hope it will have a positive effect on our oral health.