Windbags
Seems impossible! Inflate an 8 foot long bag using only 1 breath of air! It's a brand new science demonstration that illustrates the many properties of air. Each Windbag is 8 feet long, 10 inches in diameter, and holds 44 liters of air. How can such a bag be inflated using only 1 breath of air? The secret is scientific, of course! The illustrated instructions include over a dozen fun and educational activities. Pack of 4.