Review on Multi-Sized Crystal Hamster Running Ball – Run-About Exercise Ball for Small 🐹 Animals. Ideal Fitness Wheel for Hamsters, Perfect Chinchilla Cage Accessory and Small Animal Toy. by Nicole Green

I ordered a small one because my hamster is not super big yet. but the ball was a bit bigger than a baseball, small screws were included to hold it together, but it was useless, the screws have nothing to hold onto, so I twirled around for no reason, no instructions come with it. You might think the QR code on the box would help, but it's a link to a messaging app. I would come back, but I don't have a printer for that. The ball seems unsafe to the hamster. I bought a glowing one and the electrical parts are visible to the hamster so easy to access if he likes to chew on things. I used super glue to hold them together. by far the worst spent money I've bought.