Learn the amazing secret for filling this 8-foot long bag with air with only one breath! Teaches about the Bernoulli Principle, air pressure, lift, Newton’s First Law of Motion, gravity and more! Kit includes 4 Bernoulli Bags, 2 ping pong balls, plastic funnel, flexible drinking straw, string and info-packed science activity guide for performing five fun-filled science activities. Made in USA. Ages 8+.