This cat tree is just right for my 4 month old kitten. She loves the little balls that come with the activity box on bottom. They do come out but she chases them all over like a cat on crack. So much fun to watch. The tree was super easy to assemble. Came with the allen wrenches you need and that's all that was needed. It doesn't have a huge foot print so if your short on space this is great. Kitty likes it very much and so do I.