Outstanding Hobby Review Blog 

Updated 7-13-2026 This post may contain affiliate links which means we may receive a commission for purchases made through links. Read more on our Privacy Policy. Disclosure Statement: "As an Amazon Associate, I earn from qualifying purchases." A Red HO Engine Model trains are a fun and exciting hobby for kids and adults alike. One of the most popular types you will hear about is HO. If you are new to model trains, you might wonder what HO means, where it came from, and why