I am selling this because my child no longer plays with it. After use, I cleaned it with water every time, so I don't think there is any major dirt. Please check the photos for details. Regarding the important color change of the vehicles, I confirmed that the color change occurred normally when placed in ice water. Please also check the photos for this. The following are the set contents. Everything is included, but the waterproof stickers have already been applied to the product. - Set Contents: Main unit, Rail A, Rail B, Rail C, Turn Rail, Minicar (2 cars) - Types of Minicars: 923 Doctor Yellow, H5 Series Hayabusa - Accessories: Ice box, Paintbrush, Suction cups (2), Overhead wire poles, Iron bridge, Bridge piers I think this is a great deal for those who are considering buying it new. The outer box is large, so I plan to ship it with bubble wrap around the outer box packaging. Please understand this beforehand.