Some of their most dedicated proponents and advocates are all wet but
somehow manage to stay afloat for a significant length of time anyway.
Science is what can explain how boats float and work.
yes
Yes, the plural noun 'boats' is a common noun, a general word for any boats of any kind.
A cardboard tube is most common
They're usuccessful
With glue or tape, possibly with markers or paint even!
Yes! It is a good insulator. I have used it recently in a science project.
beaches, boats and cars
i think cardboard is natural and also man made
They are all boats.
Grays were a common color.
they both road on boats and did wars