Our school had the opportunity to invite some special visitors in to do an experiment. They are recent graduates from The Ohio State University and they are sisters. One is an engineer. They showed us how to make elephant toothpaste using dry yeast, hydrogen peroxide, water, dish soap and food coloring. The kids had a blast and wanted to see them do it over and over again. The "scientists" let the children pick out the colors for the toothpaste. I think it will be one they will remember for a while!