Make A Hamster Cage
Enter "PC hamster cage" in the Google search field and you'll pull up multiple versions of monitors turned hamster cages. Unlike the variation shown above, one model incorporates a white and pink Hello Kitty design and a hinged top for easy access. Another hamster cage employs what appears to be a transparent iMac chassis mounted on a clear stand. In this instance, a hole was drilled into the side for an entrance to access the interior without moving the front grille.
The version seen above doesn't seem to involve anything special, and it simply uses an old PC monitor husk to provide a unique rodent resort. If anything, the designer should have included some kind of lighting using LEDs or a miniature disco ball.