I can move, but only if I have a driver.
Or people can ride me.

People can build things out of the middle of me.
They can look very realistic.
Or they can be something out of science fiction!

The last part is a group of things.

What am I?

RIDDLE CATEGORIES

???????????? nooooooooooo aaaaaaaaaaaa vehicleblock vehicleblocl balugawhale. machinations motherfucker vgyftcfvtgyb hhhhhhhhhhhh constructers htrgtrggfdgd asggssbsbssb fsegtsggsgsg kjiihiihihih idkidkidkidk yyyyyyyyyyyy trainstation
The first user to solve this riddle was Cathy