"My mom and dad got this for my Siberian Dwarf hamster, Matthew and when he was little I put him in his ball and close the dr in my room and watch him run around the room in his ball. The only thing I didn't like about this is how you lock the ball. you have to look very carefully to see if you locked it correctly otherwise your hamster can get out. (Trust me its happened before) That is why you always want to close the door when your hamster is running around in this ball!!!!!!!!!!!!! I suggest this to anyone who has a small animal because if your hamster, mouse, rat or gerbil have this ball, they can enter Petco's hamster Derby!!!!!!!!!!!!!!"
