Here comes some giant-sized solar science fun! This 50-foot long balloon soars high in the sky powered by the sun. The Solar Ballon demonstrates buoyancy, convection, thermodynamics, and solar power, and teaches Bernoulli's Principle and Pascal's Principle. It's great for science classes and the perfect start to a science project. Bright direct sunlight on a calm, cool day has the Solar Balloon soaring in just minutes. Recommended for 1 or more players, ages 14 and up. Made in USA. Package dimensions: 10 in x 5 in x 2.5 in Includes 1 50-foot long by 29-inch diameter Solar Balloon, 400 feet of String, Complete Instructions, Science Learning Guide. Imported Material & Care Cardboard Spot clean only