Inflatable structures 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.

In the United States the terms that consist of two, one syllable words are popular. Bouncy Castle orInflatable Castles are used in Ireland, the UK, New Zealand and parts of Australia, and inflatable jumping castles in Arizona, Australia, Canada and South Africa. The term moonwalk has become a generic term for enclosed inflatable trampolines in the US.