BOY: That's me and Emma playing on the playground.
This is a piece of playground equipment.
BOY: Emma is using chalk to trace the beautiful shadow
made by this thing on the playground.
A few minutes later, we looked at the shadow.
The sun is facing this way
and the shadow was right here before.
But then this shadow moved up while the earth was spinning.
Now the shadow is right here.
Pretend this was the sun,
and then the sun was back here and the shadow was right here.
And then the sun I think is moving slowly
and then the shadow went forward.
BOY: The shadow really moved pretty fast.
Now Emma's tracing me--
I mean, not me, but my shadow.
That looks pretty good.
My shadow looks pretty weird.
We're taking a snack break.
Then we went back and I stood in the same spot.
The shadow has grown taller and moved that way.
Watch what happens to shadows as the sun moves across the sky.