The Habitrail Ovo Maze is the ideal play environment for your hamster. Hamsters have a tendancy to chew on their cage or accessories unless they are provided with an alternative, such as a chew toy. That's why Habitrail have developed this interactive cardboard maze. Hide food or treats inside the maze, and your hamster will have hours of foraging fun while chewing at the maze to get to his treats. Check your hamster's maze regularly, cutting away wet portions or replacing the maze with a new one. Tree House Maze, other maze designs available separately. To fit the Habitrail Ovo Maze (also available separately). Please note the holes in this product for your hamster to climb through measure approx 1.5 inches so depending on the size of your hamster you may need to clip the cardboard to amend the size of the holes.