BOY: That's Solmera, me and Emma.
We're making boats out of old containers.
This is one of Emma's boats.
EMMA: This is how I make the boat sink.
I press it down and, like, all the water comes in
and it will, like, sink.
BOY: My boat will never sink
because it has no openings in it.
Water can't get into my boat.
Oh! Oh, man, that's freezing.
This is a boat that I made with just a bottle.
Whoa.
EMMA: We can turn this
into a submarine
and we can make it sink by taking off the cap
and filling the water in it.
And then put the cap back on.
There's still not that much water in there.
I don't care; my hands are freezing.
BOY: With water in it,
the boat sank a little, but not all the way.
We're putting some walnuts that we found
in Emma's milk-bottle boat.
EMMA: These are not working
because this outside, it has a little life jacket
so it can float.
But these rocks don't, so it's going to push it down.
BOY: The rock made the boat sink very fast.
EMMA: Oh, no!
One rock.
BOY: Try making boats that float and sink.