The bell rocketbelt is a special tool that people can wear on their back like a backpack. It is used to help people fly through the air, just like superheroes in movies!
The rocketbelt has two small engines attached to it that use a special type of fuel called hydrogen peroxide. This fuel gets pumped into the engines and the engines mix it with a special catalyst to make a lot of very hot gas. This gas comes out of the engines really quickly and pushes the person wearing the rocketbelt up into the air!
When the rocketbelt is turned on, the person wearing it needs to be very careful because they can go really high up in the air, even up to 60 feet! It is also loud and can be a little bit scary at first.
The rocketbelt was invented by a man named Wendell Moore in the 1960s. Since then, people have used it for all sorts of things like fun, stunts, and even for the military. It's a very cool invention that makes people feel like they can do things that are impossible!