Ep 3. Rainbow Horse Toothpaste

Emily's Wonder Lab season 1 episode 3, Rainbow Horse Toothpaste, explores the science of toothpaste and its many forms. Hosted by the lively and curious Emily Calandrelli, the episode is packed with experiments and easy to understand explanations of the chemical reactions that make toothpaste work.

In the first segment, Emily introduces a classic chemistry experiment - the elephant toothpaste reaction. She mixes hydrogen peroxide with dish soap, and then adds yeast to start a chemical reaction that produces a massive eruption of foam. The experiment showcases the power of the chemical reaction between the yeast and the hydrogen peroxide, and sets the stage for the rest of the episode.

Next up, Emily visits a stable to meet some very special horses. These horses have a genetic mutation that makes their coats appear iridescent - like a rainbow. Emily sets out to find out why these horses have this unique trait, and how it relates to toothpaste. Along the way, she meets a veterinarian who explains how the horses' diet can affect their teeth, and how the food they eat can help prevent cavities.

Back in the lab, Emily gets to work preparing her version of toothpaste - with a twist. She mixes baking soda and water to create a basic paste, then adds food coloring to create a beautiful rainbow effect. But simply making colorful toothpaste isn't enough for Emily. She wants to test how well her creation cleans teeth compared to commercial toothpaste. Emily enlists her friend Ruby to help, and the two of them embark on a series of experiments to test the effectiveness of their homemade toothpaste.

In the final segment, Emily highlights the importance of fluoride in toothpaste, and takes a closer look at how this chemical can help prevent cavities. She prepares a batch of fluoride toothpaste, and then tests its effectiveness with a special UV light. The UV light shows that the fluoride toothpaste is more effective at removing plaque than the classic baking soda and water paste. Emily also reminds viewers that fluoride can be found in many sources besides toothpaste, such as tap water and certain foods.

Overall, Rainbow Horse Toothpaste is an engaging and educational episode that makes learning about toothpaste and chemistry fun and accessible. The experiments are easy to replicate at home, and the inclusion of the rainbow horses adds a touch of magic to the science. Whether you're a young viewer learning about science for the first time, or an adult looking to brush up on your chemistry knowledge, this episode is sure to delight and inform.