Balloons Don't Actually Fly (Hot Air Balloons and Blimps Too)

"What are you talking about?" you would probably say, "balloons do fly". Balloons don't fly, they float, and the balloon itself (the rubber shell) doesn't float, the air makes it float. Balloons are very elastic rubber filled with helium or just plain air, with helium, the balloon floats, with air, the balloon doesn't float. Hot air balloons work by putting fire under the base of the balloon. The fire produces hot air, and hot air goes up, so, it takes the balloon up.