Inflatable arch

An inflatable arch is like a big bouncy castle shaped like an arch that you can put up at things like sports events, races, or festivals. It's made of special material that's really strong and can hold a lot of air. You blow up the arch with a special machine called an air blower, kind of like blowing up a balloon but much bigger. Once it's all blown up, it's really strong and can hold up even if it's windy outside. People can walk or run through it, and it's a really fun way to make a big entrance or mark the start or finish line of a race.