01 Discover: What Is Length?
"Length tells us how long, how tall, or how far away something is! We measure it with rulers, meter sticks, and maps — and we always need the right unit for the job."
Centimeter
cm · about the width of your finger
Use centimeters for small things you could hold in your hand.
📏 Fun fact: There are 100 centimeters in 1 meter — that's a lot of finger-widths lined up!
Meter
m · about one big step
Use meters for things about the size of a room or a person.
📏 Fun fact: A meter is a little longer than one giant step for most grown-ups!
Kilometer
km · about a 12-minute walk
Use kilometers for long distances, like between towns.
📏 Fun fact: 1 kilometer equals 1,000 meters — that's about 500 giant steps!
Tap a card for a fun fact
02 Ruler Lab: Measure It!
Drag the marker to measure
Pick an object, then drag Milo along the ruler until he's lined up with the end of the object. Lock in your answer to see how close you got!
Drag Milo to the end of the crayon, then lock in your answer!
03 Sort It: Pick the Right Unit
Tap an item, then tap its bin
Every real-world thing belongs with cm, m, or km. Sort all 8 before the round is done!
04 Convert: Small to Big
Centimeters → Meters
100 centimeters make 1 meter. Slide to fill up the meter sticks!
each block = 1 meter (100 cm)
Meters → Kilometers
1,000 meters make 1 kilometer. Slide to fill up the kilometer markers!
each block = 1 kilometer (1000 m)
05 Quiz: Prove It!
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06 Mission Badge
Length Master
You explored centimeters, meters, and kilometers — and Milo couldn't be prouder!