Kodu Game Lab Enables Amateurs to Build XBOX Games

This article has more details but here is a quick summary:

Kodu Game Lab, a visual programming tool that allows just about anybody with an imagination and a spare $5 to make their own games, has released on the XNA Community Games channel on the Xbox Live dashboard. The entire tool was built using XNA Games Studio, the same development platform made publicly available to anybody interested in making their own XNA games.

I will have to check it out this weekend.  My daughters love in game level editors.  I think they will love this.