I believe the balls are made of plastic, so yes, they do make a bit of noise when they fall on the ground. However, no, a person wouldn't slip on them. The balls are made that way purposely. They are hollow on the inside. Weak enough to be stepped on, but tough enough to maintain good condition with ferret play.

You could try this with your hedgehog. If your hedgehog doesn't like it, you will see by his body language and facial expression. I try different things with my chinchillas and degus. Some work, some don't. I just give it to a ferret rescue, if it is safe for them to use it, if your hedgehog doesn't like it.

Each bunny is different; some love all kinds of toys (like my Pico) and doesn't discriminate--lol--but other bunnies are fickle. As for a bunny not knowing what to do with the balls (per what the one person claimed)--not true. My bunnies play with EVERYTHING. In fact, I made something similar to this a long time ago, and they had fun with it no differently than any other species. It really is a hit or miss, though, as again, each bunny has a different personality regarding toys. If you decide to get it, and your bunny doesn't care for the balls, then just remove them and put crumpled newspaper in there; we all know bunnies love that! My only concern would be what the other poster noted, in regards to the weight of your bunny. Being a hefty nine pounds might just squish the balls (depending on their resiliency) and not be much fun for your bun. Plus, with her size--not just her weight--she might not even be able to fit into the entry holes, let alone wiggle around much within the cube. I'd say this toy is more for a dwarf rabbit under 4 lbs.

Ya he would love it but I probly not the tube accessories

The balls do fit through the holes. However, they are too slick for my ferrets to grab a hold of, but they end up playing/kicking them out of the holes. Not a lot of them, but a couple end up outside the box.