ISABELLA: Demi and I are playing with balloons
that are filled with helium.
I'm tying balloons to a little box.
This is six balloons.
Whoa, it floats!
Yes!
Let's see if it floats with the chick in it.
It doesn't float.
We need to add more balloons.
Now we have 12 balloons.
It floats! It floats!
Yay!
We are trying to lift two different things:
a small plastic crocodile and a big egg.
It lifts!
Upsy-daisies.
Now we are going to try the crocodile.
Oops, it doesn't.
I don't think the crocodile is bigger than the egg,
but it's heavier than the egg.
ISABELLA: We each have 12 balloons.
We can't really tell which of these is heavier.
Maybe the balloons will tell us.
My frog is floating up in the air.
Bella's car is not floating up, because it's heavy.
ISABELLA: You can't really tell how heavy something is
just by how it looks.
I thought that this blue car was light because it was small.
ISABELLA: Try lifting different things with balloons.
(both shouting excitedly)