This is a cute experiment I built back in 2010 while I was trying to figure out the ins and outs of Box2DFlash, a free 2D physics engine for Flash (Sorry! IOS devices!). The way you play with ‘Pizarra’ is simple: You grab the pen and draw few things. Once you are finished drawing, place the pen back to the tray and click the ‘Preview’ button (and Boom!, magic happens!).