Best Physics Apps for Kids
Best Physics Apps for Kids
Product recommendations are based on editorial evaluation. Verify age-appropriateness for your child. Affiliate links may be present.
Physics governs everything children interact with — gravity pulling a ball to the ground, friction slowing a bicycle, light splitting into colors through a prism. Yet physics is often taught as a set of formulas rather than a way of understanding the physical world. The best physics apps for kids reverse this pattern, letting children experiment with forces, motion, energy, and waves through interactive simulations that build intuitive understanding before formal instruction. We tested the leading physics apps to find those that make the invisible forces of the world visible and playable.
How We Evaluated
Each app was tested by children aged 7 to 14 over a three-week period. We scored on five criteria:
- Scientific accuracy — Do the physics simulations behave realistically?
- Conceptual clarity — Does the app help children understand why things happen, not just what happens?
- Interactive experimentation — Can children change variables and observe different outcomes?
- Engagement — Do children explore voluntarily beyond assigned activities?
- Age range coverage — Does the app serve both younger and older children effectively?
Top Picks
| Product/App | Age Range | Price | Our Rating | Best For |
|---|---|---|---|---|
| Simple Machines by Tinybop | 6-10 | $2.99 | 4.8 / 5 | Best for younger kids |
| Algodoo | 8+ | Free | 4.9 / 5 | Best sandbox simulation |
| PhET Simulations | 10+ | Free | 4.8 / 5 | Best classroom supplement |
| The Sandbox | 8+ | Free / $4.99 | 4.6 / 5 | Best particle physics play |
| Crayon Physics Deluxe | 7+ | $4.99 | 4.7 / 5 | Best puzzle-based physics |
Algodoo — Best Sandbox Simulation
Algodoo is a physics sandbox where children draw objects and watch them interact according to real physics. Draw a ramp and drop a ball — it rolls down with accurate gravitational acceleration. Build a pulley system and test whether it reduces the force needed to lift a load. Create a pendulum and observe its period. Every object has adjustable properties: mass, friction, elasticity, and charge.
The creative freedom is extraordinary. Children can build Rube Goldberg machines, simulate car crashes, design bridges, or experiment with buoyancy. Because the physics engine is accurate, children develop correct intuitions about forces, motion, and energy. The app works on tablets and computers, with a large community sharing downloadable scenes.
Why parents love it: Algodoo is free and provides deeper physics experimentation than most paid apps. Children who use it regularly develop strong intuitive understanding of mechanics, gravity, and friction. The creative element keeps them engaged for hours.
Limitation: The interface can feel overwhelming at first. Younger children may need guidance to discover the app’s full capabilities.
Simple Machines by Tinybop — Best for Younger Kids
Simple Machines introduces six fundamental machines — lever, wheel and axle, inclined plane, wedge, screw, and pulley — through interactive explorations. Children move a fulcrum to understand leverage, roll objects up ramps of different angles, and turn screws to see how rotational motion converts to linear motion. Each machine is presented in a real-world context.
The app strips away complexity to focus on core concepts. There are no scores, no timers, and no text instructions. Children learn through direct manipulation, discovering principles by experimenting with each machine.
Why parents love it: The app teaches fundamental physics concepts at exactly the right level for elementary-age children. The visual design is beautiful, and the interactions are intuitive. One-time purchase with no ads.
Limitation: The content covers only simple machines. Children interested in broader physics topics will need additional apps.
PhET Simulations — Best Classroom Supplement
PhET, developed by the University of Colorado, provides free interactive simulations covering forces, energy, waves, electricity, and more. Each simulation lets children manipulate variables and observe outcomes — adjusting friction on a ramp, changing voltage in a circuit, or altering wave frequency. The simulations are accurate enough for college physics courses but accessible enough for middle schoolers.
Why parents love it: PhET simulations are used by physics teachers worldwide. Children who explore them develop the ability to think about physics quantitatively. All simulations are free and available on the web. The depth of content is unmatched.
Limitation: PhET simulations are tools, not games. They require curiosity or guided activities to be engaging. Younger children may need adult direction.
Crayon Physics Deluxe — Best Puzzle-Based Physics
Crayon Physics Deluxe challenges children to draw shapes that interact with gravity and objects to guide a ball to a star. The crayon-drawn aesthetic is charming, and the puzzles require genuine understanding of gravity, momentum, and mechanical advantage. Solutions are open-ended — there are many ways to solve each puzzle.
Why parents love it: The puzzle format provides motivation and structure that sandbox apps lack. Children develop physics intuition while solving satisfying puzzles. The open-ended solutions reward creative thinking.
Limitation: The art style may feel young for older children, and the game has a finite number of puzzles.
The Sandbox — Best Particle Physics Play
The Sandbox lets children create worlds by placing particles that interact according to physics rules. Water flows downhill, fire spreads to wood, electricity conducts through metal, and plants grow toward light. Children build ecosystems, design circuits, and create chain reactions.
Why parents love it: The particle-based approach teaches cause-and-effect thinking and properties of matter. Children discover physics principles through experimentation and observation.
Limitation: The free version has limited elements. Full access requires purchases or subscriptions.
What to Look For
When choosing physics apps for children, match the app to the child’s developmental stage. Children under 10 benefit from concrete, hands-on apps like Simple Machines and Crayon Physics. Children 10 and older can handle the abstraction of PhET simulations and the complexity of Algodoo. The best physics learning happens when children form predictions, test them, observe results, and revise their understanding — look for apps that support this cycle.
Complement physics apps with real-world experiments. Build ramps with books and race toy cars. Construct pulley systems with string and spools. The combination of digital simulation and physical experimentation produces the deepest understanding. For more STEM resources, see our best STEM toys by age guide.
Key Takeaways
- Algodoo provides the most powerful free physics sandbox for children aged 8 and up
- Simple Machines by Tinybop is the ideal starting point for children under 10
- PhET simulations offer university-quality physics tools that are free and accessible
- Physics apps are most effective when children form predictions before experimenting
- Pair digital simulations with real-world experiments for the deepest learning
Next Steps
- Explore our best STEM toys by age for physical science kits that complement physics apps
- Read our guide to teaching kids to code to connect physics thinking with computational thinking
- Check out our screen time rules by age for balancing digital and hands-on learning