Coderover is a project mainly written in Scala, it's free.
Game involving using a simple programming language to guide a robot around a grid to accomplish various tasks.
h1. Code Rover
The purpose of Code Rover is to provide an environment where intermediate programming concepts can be learned. The primary audience are ages 10 and older. Please see the Wiki (http://github.com/daltontf/coderover/wiki) page for more information on the language.