From the back of the box: Build. Play. Customize. •Build and play with unlimited 3D LEGO bricks in a vertual environment •Combine finished models to create imaginative LEGO worlds •Add extra excitement with action bricks, including hinges, rotors, lights and Destructa bricks •Generate and print building instructions, then share them with friends •Enter and investigate the buildings you create from the viewpoint of a LEGO mini-figure.