Sandbox was developed in 2008 by iShed, part of Watershed in Bristol. The inaugural Media Sandbox supported six companies from across the South West to develop early stage digital media ideas. Now in its fourth year, 19 companies have participated in Media and Theatre Sandboxes, creating games, apps, installations and software.

Heritage Sandbox, part of REACT, supports six projects exploring new experiences around heritage and is designed to encourage collaborations between arts and humanities researchers and creative economy companies. The successful projects seek to engage users and facilitate new kinds of social interaction designed with multiple audience touch points in mind.