Build-it-yourself Xbox gaming

Kodu
Build your own virtual playgrounds. Then build your own games.

During Microsoft's keynote speech at CES, a 12-year old girl named Sparrow created a virtual environment on the Xbox 360. It was the first public glimpse of Kodu, a new tool for building game worlds.

Nothing new about that you might think. LittleBigPlanet on the PlayStation 3 already offers sandbox world-building.