ANGEL: Isabel, Sylvie and I are playing with cars.
Go!
ANGEL: We're trying to figure out how to use a rubber band
to launch the cars.
I know a way we could do it, except it might not work.
ISABEL: Look how far it went.
ANGEL: We pushed it into the rubber band and then let go.
Sylvie is tying two rubber bands together.
ANGEL: This is a longer rubber band now.
It doesn't roll, it flips.
ANGEL: Now we're trying a different car.
Ah, that went much better!
ISABEL: This one's bigger, and it has bigger wheels.
ANGEL: I am stretching the rubber band just a little bit.
And the car goes very slow and not that far.
Now pull it tight.
ISABEL: When Angel gets the rubber band tighter...
...the car goes much farther and it goes faster.
ANGEL: Isabel is carefully attaching
a really big rubber band to a chair.
(laughing)
If I pull back a little bit, it doesn't go so fast.
And if I pull it back a lot...
...it goes really fast.
ANGEL: Try launching toy cars with rubber bands.
First!
Second!
Third!
(giggling)