Dave there is an "S" scale American Flyer. its 1/64 scale. They are now reproducing it and all the goodies that go with it. You can go "O" or 027. There are MANY radius curves so you can mix and match "OR" use what I used its called Gargraves. You but it in 3' lengths and bend it anyway you choose. You just have to cut the ends to match. Dremel and cut off wheel. Also on the engines you can spend a ton on the fancy stuff or a lot less with Williams and others that are just as nice looking but don't "Talk to you or start and stop by themselves". If you need any help I would be more than happy to advise or help. Let me warn you TRAINS ARE CONTAGIOUS almost as bad as hot rodding and about as expensive.