The Crest Eggsperiment is a great way to demonstrate to your kids about dental health and cavities. It also makes a great science class project for kids.

This experiment takes five to six days. We recommend you start on a Thursday or Friday afternoon. That way, you can perform all the steps right after school or supper. When you try the experiment, use several eggs in case one gets broken by accident.

• 130mL tube of Crest Cavity Protection toothpaste (active ingredient: sodium fluoride)
• glass measuring cup
• fresh eggs without cracks
• table vinegar
• teaspoon
• plastic wrap
• marker
• clear nail polish
• paper towels

Eggshells, like teeth, contain minerals and must stay strong to do their job. Both eggshells and teeth can be weakened by acid, which is why good dental hygiene is so important.

Vinegar is an acid similar to the acids made by plaque bacteria in our mouths every day. These acids can cause tooth decay and cavities.