I bought this toy a long time ago and it's been sitting around. If you search for "marble walking in the air," you'll find videos on YouTube and other sites. I think it's probably a discontinued product. I'm selling it as a used item, and I've kept it at home, so please understand that. It's easy to scratch when assembling. I don't think there are any noticeable stains or scratches, but I'm just a regular person, so I apologize if I missed anything. Please refrain from purchasing if you are very particular. Please understand that it will be shipped in simple packaging. No claims or returns after purchase. Thank you for looking.