Hello and welcome to my very first talk about Box2D. I'm Yarek, one of the computer programmers who have been messing up with Box2d for Flash. In fact I'm dedicating this speech to talk primary about WCK ( World Construction Kit ). I imagine that some of you have already heard these names. Box2D is basically the two-dimensions engine by excellence and is been ported to several programming languages, in this case we are making an approach to the Action Script 3.0 version.