Watch That Giant Geyser Explode With Hands-On Science Fun: Ready to wow your science students, homeschoolers, or camp kids? Our Geyser Tube comes with a pack ofMentos candy so all you need to complete the set is a 2-liter bottle of soda. Add the candies and see how high the resulting geyser blows-many reach upwards of 30 feet in the air! Our specia..