[Multi levels & full of fun] [Unique rocket design] [High quality & high durability] The stable design based on the mechanical principle which is hard to shake even if a big cat plays. The entire surface is soft to the touch, so even small kittens can sleep safely. [Easy to assemble] An instruction manual is attached. We will explain the parts details, assembly method, maintenance method, etc. in an easy-to-understand manner with text explanations. Please read it and assemble it correctly.