About Balancing Act

Play with objects on a teeter totter to learn about balance. Test what you've learned by trying the Balance Challenge game.

How to play Balancing Act

Everything is hands-on: drag, click and experiment — the simulation reacts instantly. Play with objects on a teeter totter to learn about balance.

Questions & answers

What is Balancing Act?
Balancing Act 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 objects on a teeter totter to learn about balance. Test what you've learned by trying the Balance Challenge game.
What can kids learn from Balancing Act?
It helps kids explore: predict how objects of various masses can be used to make a plank balance. predict how changing the positions of the masses on the plank will affect the motion of the plank. write rules to predict which way a plank will tilt when objects are placed on it. use your rules to solve puzzles about balancing.
What age is Balancing Act good for?
It is designed for elementary school (roughly ages 5–10) up to university, and curious kids outside that range can absolutely enjoy poking around it too.
Is Balancing Act free to play?
Yes — Balancing Act is completely free on crumble.lol and runs fully in your browser on computers and tablets.

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