01 Discover: What Is Mass?
"Mass tells us how heavy something is! We weigh light things in grams and heavy things in kilograms — and we always pick the unit that fits the object."
Gram
g · about as light as a paperclip
Use grams for small, light things you can hold easily in one hand.
⚖️ Fun fact: A paperclip weighs about 1 gram — it takes 1,000 of them to equal 1 kilogram!
Kilogram
kg · about as heavy as a bottle of water
Use kilograms for things that feel heavy to lift or carry.
⚖️ Fun fact: A full 1-liter water bottle weighs about 1 kilogram — exactly 1,000 grams!
Tap a card for a fun fact
02 Scale Lab: Weigh It!
Drag the pointer to weigh it
Pick an object, then drag Milo along the digital scale until the reading matches how heavy you think it is. Lock in your answer to see how close you got!
scale reads 0 – 1,000 grams
Drag Milo until the scale matches the feather's weight, 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 grams or kilograms. Sort all 8 before the round is done!
04 Convert & Compare
Grams → Kilograms
1,000 grams make 1 kilogram. Slide to fill up the kilogram blocks!
each block = 1 kilogram (1000 g)
Balance Seesaw
Pick two objects and watch the seesaw tip toward the heavier one!
05 Quiz: Prove It!
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06 Mission Badge
Mass Master
You weighed, sorted, converted, and balanced grams and kilograms — and Milo couldn't be prouder!