Has anyone mentioned that you have an On30 train set made by Bachman? Hawthorne Village markets specially decorated trains for Christmas and collectibles. They are not HO. They are not O scale. They are roughly O scale trains built to run on HO track. Are you familiar with the various scales and track gauges? HO and On30 tend to have highly detailed and delicate parts easily broken off by youngsters. If your son is interested in trains you might be better off with a starter set in S or O scale (larger, less detail and easy to handle) themed with something that interests him. You can easily build you own set from online auctions of used equipment. Do you have a train store or is there a train show in your area?