About Proportion Playground
Play with ratios and proportions by designing a necklace, throwing paint balloons, playing billiards, or shopping for apples! Make predictions about proportions before they are revealed.
How to play Proportion Playground
Everything is hands-on: drag, click and experiment — the simulation reacts instantly. Play with ratios and proportions by designing a necklace, throwing paint balloons, playing billiards, or shopping for apples!
Questions & answers
- What is Proportion Playground?
- Proportion Playground is a free interactive simulation from PhET Interactive Simulations (University of Colorado Boulder) that you can play right in your browser on crumble.lol — no downloads and no sign-up. Play with ratios and proportions by designing a necklace, throwing paint balloons, playing billiards, or shopping for apples! Make predictions about proportions before they are revealed.
- What can kids learn from Proportion Playground?
- It helps kids explore: use a ratio as a descriptive characteristic compare the meaning of a ratio in different contexts use scaling to build proportions or find a missing value in a proportion simplify ratios to build proportions or find a missing value in a proportion use multiplicative reasoning to solve problems.
- What age is Proportion Playground good for?
- It is designed for elementary school (roughly ages 5–10) up to middle school (roughly ages 10–14), and curious kids outside that range can absolutely enjoy poking around it too.
- Is Proportion Playground free to play?
- Yes — Proportion Playground is completely free on crumble.lol and runs fully in your browser on computers and tablets.