Vinnie Volcano, who is one of The Quirkles, KOLR 10, Terri Johnson, and Sherry Cook demonstrate the concept of geysers by combining Diet Coke and Mentos. This activity can be great for science experiments and is sure to be entertaining for all. The Quirkles books - http://www.quirkles.com - are an educational series that offer a fresh new way to integrate literacy and science at school or at home. Each book is full of vocabulary builders, character education lessons, and two related science experiments that allow for hands on activities, helping to reinforce the topics that were just read. The series was created by teachers, and each story teaches/reinforces the phonetic sounds that serve as the building blocks for reading, while also making science--earth, physical, and life--fun to learn.