Is it Bernoulli's Principle or the Coandă Effect? Using high energy activities, your students will learn about air pressure and common but counter-intuitive phenomena. Our kit provides everything you need to demonstrate the relationship of air speed and air pressure for students in grades 4-8. The lessons can easily be adapted for younger or older students. Materials for 25 students. Includes 25 funnels, 28 ping pong balls, 50 flex straws, roll of kite string, 100 cards, 50 toothpicks, and detailed instructions. Read more on our Blog!