Area 120 is a company that is in the Google Incubator and has created tools to help program and improve technology literacy. Its latest creation aims to transform any user, without prior experience, into a producer of 3D video games. The idea is to "make the construction of a video game as if it were to play its own".
This game / editor is built to be used cooperatively with friends and family, as multiple users can participate in projects and experience real-time creations. Google says it's possible to produce a game in 10 minutes or spend hours refining a more elaborate project.
You can download Game Builder directly from Steam.