[This is a trick question. Technically he's never flown between worlds, he just used corridors to pass between them, but that is definitely way too complicated to try and explain.]

I've done a lot of inter-world travel. For, ah... work. [Well, it's not a lie.] I did a lot of infomining back home, up until just recently. Lots of observation and learning about new places. The travel was a nice perk, but ultimately the job just wasn't for me. [He sticks his tongue out.] The management was terrible, for starters.

But yeah, the ships are all made out of Gummi Blocks. Doesn't seem very structurally sound, if you ask me, but Sora seemed to get along just fine with them.

((no worries, this has been fun and i'll look forward to continuing it when you can!))