Inflatable Jumper is also called Inflatable Moonwalk. Inflatable structures are large cold-air structures that people (usually children) can bounce on for recreation. They are often in the shape of a castle. The walls and floor are soft.

The name given to such structures varies. In the United States, East Coasters refer to them as a “moonbounce” while West Coasters stick to the generic name of “inflatable playground”. They have been marketed with such names as Moon Bounce, Astrojump, Moonwalk, Bounce house, SpaceWalk, in the US, bouncy castle or inflatable castle in Ireland, the UK and parts of Australia, and as jumping castles in Arizona, Australia, New Zealand, Canada and South Africa. The term “moonwalk” has evolved as the generic term for enclosed inflatable trampolines in the US.

Inflatable strutures are rented for functions, school and church festivals and village fetes. Although they are aimed at children, adult castles can be hired in the UK. Because of liability concerns, moonwalks are rarely rented to adults in the US.

The growth in popularity of moonwalks has led to an inflatable amusement industry which includes inflatable slides, obstacle courses, games, and more. Inflatables are ideal for portable amusements because they are easy to transport and store.