In this activity related to flight, learners conduct two simple tests to explore how lift works. In "Use Your Lips to Levitate," learners hold a piece of paper, blow over the paper, and watch Bernoulli's Principle in motion. In "Balloons that Boggle", learners investigate what happens when they try to blow two hanging balloons together. See related resource "What's Going on? The Simple Explanation" to better understand the forces at work in these tests. Use these activities to demonstrate Bernoulli's Principle and help learners understand the role of lift in flight. This resource is related to two other activities in the SMILE Pathway: Look Mom, No Wings! and Squeeze the Stream.