I'm not sure what scale these would for real but I had a box out and ended up building these out of boredom
Submarine with 2 mini subs.
Maybe some kind of battle cruiser with an opening hanger bay probably?
And then various space ships
The white and dark blue one is my favorite!
They look like some pretty fun little builds
Oh look, it's Thunderbird 4!
I like these! Especially the wing shape of the battle cruiser.