Harness the power of the sun and watch this giant solar balloon soar! Using only sunlight, the balloon lifts into the sky, giving an amazing demonstration of solar energy and buoyancy. Measuring 50 feet long and 29 inches in diameter, it’s a lightweight marvel that rises as the sun heats the air inside. The set includes the balloon, 400 feet of string, full instructions, and a science guide explaining the physics behind the flight. No helium or gas needed—just sunlight and curiosity. Perfect for science fairs, classroom demos, or backyard experiments. Recommended for ages 14 and up.