Something like that, only with things made of metal and electricity.
Mother, this is very hard to explain. A dimension...it's a level of reality, you could say. For instance, you have always lived in a place called Middle Earth. Here, we only know it as planet earth. However, if you transport across this dimension, this plane of reality I have always known, you can end up in Middle Earth, your plane of reality. I think I'm only confusing you more, aren't I? I'm so sorry, dear, even scientists of the highest caliber can't always explain it, and I'm not scientist myself. Truthfully, I'm a goddess, though one of knowledge.