Space ships are usually one seat, but can also fit two or more seats if you make it big enough. Also, you can make storage units with opening and closing things, like droors, panels, or even popup things that people can find by exploring it. If it's a attack ship, put guns, or blasters, or mabie even a sharp vibro-wing. Also, don't forget to add wings or rocket boosters (optinal). Also, if its a cargo ship, dont put wings or guns on it. If it's a modal, put whatever you want on it, BUT REMEMBER: Never battle someone with a modal OR prototype. If you build with megablocks, you will probly lose.