Egg in cola

Children see what sugary drinks do to an eggshell, which is similar to tooth enamel.

Steps

1. Put one egg in cola, another in water and a third in juice.
2. The next day, children take the eggs out and compare the colour.
3. They try to clean the shells with a toothbrush and toothpaste.
4. Chat: why do we brush our teeth or rinse our mouths with water after sugary drinks?

Tip: The experiment takes a whole day, so start it the day before.

Materials needed

• Children's toothbrushes (1 per child)
• Jars with lids (3 pieces)