Powers of Ten for Kids:
a zoom from the universe to your hand
“Powers of ten” means multiplying by 10 again and again: 10, 100, 1,000, 10,000… Each step makes things ten times bigger. It is one of the best ways to help children feel how huge space is — and how everything, from their hand to the Milky Way, fits on one ladder of sizes.
What is a power of ten?
A power of ten is 10 multiplied by itself. 10² (“ten squared”) is 10 × 10 = 100. 10³ is 1,000. The small number on top tells you how many zeros come after the 1. For young children you don’t need the notation at all — “ten times bigger, and ten times bigger again” is enough.
The idea was made famous by Powers of Ten, a 1977 short film by designers Charles and Ray Eames. It begins with a picnic blanket seen from one meter away, then pulls back ten times farther every few seconds until the whole galaxy is a speck — and then dives back down, into a hand.
A size ladder kids can climb
| Size | About this big | Something that size |
|---|---|---|
| 1 cm | 10⁻² m | A fingernail |
| 10 cm | 10⁻¹ m | A child’s hand |
| 1 m | 10⁰ m | A 4-year-old (roughly) |
| 10 m | 10¹ m | A house |
| 100 m | 10² m | A soccer field |
| 1 km | 10³ m | A neighborhood walk |
| about 12,700 km | 10⁷ m | Earth’s diameter |
| about 384,000 km | between 10⁸ and 10⁹ m | Earth to the Moon |
| about 150 million km | 10¹¹ m | Earth to the Sun (light takes about 8 minutes 20 seconds) |
| about 100,000 light-years | 10²¹ m | Across the Milky Way |
Values are rounded to show the pattern. Each row is not always exactly ten times the one above — the point is how fast the numbers grow.
Three hands-on activities (no screen needed)
- Ten steps, then a hundred. Walk 10 steps together, then 100. Ask: how many steps would 1,000 be? Children feel how quickly “ten times more” runs away from you
- Zoom-out drawing. Fold a sheet into four boxes. Draw: my hand → me → my house → my town. Each box is “zoomed out” from the last. Older children can keep going on a second sheet: country → Earth → Solar System → galaxy
- Nested circles. Make a cosmic address: the universe, the Milky Way, the Solar System, Earth, your country, your home, you — each circle inside the next
Talking points for curious kids
- “If Earth were the size of a grape, the Moon would be a small pea about an arm’s length away.”
- “The light you see from the Sun left it about eight minutes ago.”
- “Our galaxy is so big that light takes about 100,000 years to cross it.”
Zoom the whole ladder with a tap
The free web app You Are Here turns the size ladder into one continuous journey for ages 4–8: from the universe to the Milky Way, the Solar System and Earth, down to a 3D map of Japan — and then into the human body, where children can tap the heart, lungs and 14 more organs. Its Scale Ladder game asks kids to put the galaxy, Earth, Japan and themselves into nested rings in the right order. Every word is read aloud in English, with no ads and no sign-up.
The app zooms down to organs of the body; it does not go down to cells or atoms.