Our Pre-school class simply loves experimenting! In the last few weeks  they have been discussing how to take care of and keep their teeth  clean and healthy. Their latest hands-on investigation allowed them to  see how certain liquids change the color of teeth. They used three  common beverages (water, milk, coffee), and hard boiled eggs (teeth) as  the tools in their investigation. The results of the experiment amazed  them! Their conclusion? "Water and milk are good for your teeth. You  shouldn't drink too much coffee!"