(girls squealing)
GIRL: We are watering a tree in the yard.
The water from the hose is collecting right here,
and it's not going anywhere because this is overlapping
and blocking it like a dam.
Now we are running the water to make a stream.
The water is coming from the hose
and it's flowing down there.
So we're trying to block it.
All the water's going around it.
These boards might help.
They're blocking the water, and we're putting objects...
GIRL: We've got this stone now, and it's going to go right here.
It helps hold it up.
Well, we're trying to make a dam,
so we have to work really hard.
It's not working because the wood is making
lots of different kind of cracks.
It's harder than we thought.
I'm going to collect some mud right here,
because that's how beavers use glue: they use mud.
That feels good!
Cullen and Alix are trying to block the cracks.
We're getting lots of mud and putting it
on top of the wood.
This is the dam we've been working on.
We have stopped a lot of water and made a pool.
And it's full of mud.
We are going to break this dam.
One, two, three!
When we broke the dam,
the water really flowed out fast.
Look at what's happening here!
Try making a dam to stop or change the flow of water.