Photos: DIY Mentos geyser

Steve Spangler, a television host in Colorado with a side toy-making venture, demonstrates his "Geyser Tube" Sunday at the Toy Fair in New York. The toy is a plastic funnel that triggers a geyser by dropping Mentos candy into 2-liter soda bottles. It lets youngsters duplicate the "science" experiment demonstrated in a now-famous YouTube video, "The Diet Coke & Mentos Experiment."

Photo by Greg Sandoval/CNET News.com