This semester’s Middle School science theme is the “forces of flight.” Students began to analyze the forces of drag, lift, and gravity related to kites. Then their studies required an understanding of the concepts of density and buoyancy as related to “Hot Air Balloons.” The science behind why a hot air balloon lifts up into the sky involves the principle of density (D=M/V) and buoyancy (Archimedes’ Principle). A Hot Air Balloon flies (actually floats) because the hot air in the balloon displaces more than its own weight in the surrounding cooler air. The Middle School students tested these principles by making their own tissue paper balloons and inflating the balloons with hot air produced from a heat gun. The results were spectacular dotting the sky over our school with colorful balloons reaching altitudes of 200 feet.