This is the start of a choral reading. You can read it in many different ways and add many new verses. One way to read it is to have one group read the refrain, the repeated boldfaced lines. Other groups or individuals could then say the verses.
Millions and billions and trillions of cells,
So small we cannot see them
Made of atoms and molecules
The building blocks of life
Millions and Billions and Trillions of Cells
A Choral ReadingBy David Cochran