Phun - Algodoo

To build machines, you need to connect things and make them move.

It was nearly impossible to trademark a deliberate misspelling of "fun". phun algodoo

(formerly known as ) is a free 2D physics sandbox software used by students, educators, and hobbyists to create and explore interactive physical systems. It was originally created by Emil Ernerfeldt as a master's project and is now developed by Algoryx Simulation AB Key Features of Algodoo Intuitive Drawing & Tools To build machines, you need to connect things

(the predecessor) and (the modern version) are 2D physics sandbox applications developed by Algoryx Simulation . They allow you to create interactive scenes where objects behave according to real-world physics laws, including gravity, friction, and fluid dynamics. 1. Getting Started It was originally created by Emil Ernerfeldt as

Algodoo (formerly Phun) is an approachable, hands-on 2D physics sandbox that makes learning and exploring mechanics fun and visual. With a simple drawing system you can create gears, ramps, fluids, and contraptions, then watch them come alive under realistic physical laws. Assign materials like rubber, wood, or steel with adjustable density, friction, and bounciness. Connect parts using hinges, sliders, and springs, add motors to inject motion, and use sensors and scripting to create logic and interactive behavior. Algodoo runs simulations in real time with controls for slow motion and step-by-step playback so students can observe cause and effect. Export scenes and recordings for presentations or sharing. Designed for educators and hobbyists, Algodoo supports inquiry-based learning in physics and engineering: students form hypotheses, build models, test, and iterate. Its playful interface removes barriers to experimentation while underlying physics remain faithful, providing an engaging bridge from intuition to formal concepts like Newton’s laws, conservation of energy, torque, and fluid dynamics. Whether you’re teaching a classroom lesson on collisions or prototyping a Rube Goldberg machine, Algodoo turns abstract mechanics into something you can touch, tweak, and test.

While it looks like a simple drawing tool, Phun/Algodoo is a powerful interactive simulation environment. It allows users to: Build Mechanical Wonders