DEMI: We are rolling balls down cardboard.
BENNETT: I think my ball won.
JOE: Mine came in last.
DEMI: Bennett made a cardboard ramp leading to a flat track.
I'm trying to make my marble turn.
(makes buzzer sound)
That didn't work.
I'm a failure.
The cardboard is flat,
so maybe I should, like, change the shape.
I could use a little help here.
JOE: We folded the track
so it would keep the ball on the track.
DEMI: We tried to make walls.
(imitating buzzer)
Still no go!
The balls just keep on jumping over the wall.
DEMI: Joe made the wall higher.
JOE: I bet that'll work.
BENNETT: Almost!
DEMI: We need to slow this ball down.
Every time it goes down really fast, it rolls, like, over it.
JOE: We moved the ramp from up here to down here
so it would slow the ball down.
DEMI: Yay!
JOE: Yeah, it works.
DEMI: Iris has a piece of foam pipe stuff.
And now we have a half of a pipe,
because Iris's mom helped us cut it.
We are making a loop.
It'll roll down here and it'll shoot up the loop.
That's cool.
DEMI: Try playing with ramps and tubes and balls.
KIDS: Cool!