Whew, what a topic description!  Folks, my grandson is showing interest in HO trains....neat......

My situation is this:  Living in Germany presents a different power source than found in the US.  At 220V50Hz is the common source.  So, does anyone know if the product (powered items like diesels, other "engines") motors (120V @ 60Hz I think) can somehow be modified to "work with local German power source"?  Swapping out shells with German HO products sold can be expensive.  I thank you in advance for any and all thoughts and solutions.