GO! GO! Airplane! Purchased last year at Centrair. I think there are no noticeable stains. Soon after purchase, the yellow airplane stopped running, so I contacted the manufacturer and they sent me a new one. Therefore, I have four airplanes. As shown in the 7th photo, it seems that there was some debris on the tires, so I rubbed them with something like sandpaper and they started running. I've been playing with them like this. Please try this if the airplanes' gliding becomes poor after purchase. Product Description: When you turn on the switch, the music box sound of "It's a Small World" plays, and three airplanes automatically fly through the sky on the panel, run on the rails, and then fly again, repeating this cycle. The outer box and accessories are all included. Operation has been confirmed. Please note that batteries are not included. This is a used item that a child has played with, so please understand.