This exercise is used to help learners visualize the answer to the problems described on the page. The instructions at the bottom of the page describe how the VRML cube can be accessed using a keyboard. The cube can be rotated, brought closer or moved further away, or moved from left to right or visa versa. By clicking on the cube, the interior is revealed in which the cube has been cut into 27 equal size smaller cubes. There is currently no way to reveal the interior of the cube other than clicking on it. As a result a view of the interior will not be possible for users who are unable to use a mouse or other pointing device.