The video is being made. Until it arrives, here is what it will say (117 words, about 58 seconds):

Here's Miss Underwood's class at field day.

Roman has just won the race. His chest goes up and down, and his heart thumps.

Dean sees a ball flying his way, and his hands are there to catch it.

By the fence, in a dry corner nobody waters, a prickly plant is green.

What is going on inside Roman, and how did Dean's hands know where to go? And how does that plant live with no water?

To find out, we will look at the heart, the lungs and the stomach, plants in dry places, and how eyes, brain and hands work together.

Okay, so are you ready to find out what the parts inside living things do?

It ends with a ready line. Then pick a reply below — any reply counts.