EaselBox adds convenience methods to create those objects, as well as giving you direct access to the underlying EaselJS and Box2dWeb entities if you'd like to manipulate them directly.
To run examples locally
cd server npm install node server/app.js open browser to http://localhost:3000
In addition to your own JS files, you need to require the following:
easel.js Box2dWeb-2.1.a.3.min.js (or later) easelBox.js
To re-build source
EaselJS API easeljs.com/docs/
Box2d API www.box2dflash.org/docs/2.1a/reference/