Around the age of one, they enjoyed watching balls roll. From the age of two, they started assembling and rolling them together, learning how they work. This is a very high-quality toy with beautiful colors, and adults can enjoy it too. The box and instruction manual are not included. There is a small red stain on the wooden rail part in the second picture. Other than that, it is in clean condition with no noticeable stains. It will be shipped in simple packaging. Please refrain from purchasing if you are sensitive to items stored at home.