Phun Algodoo
It sounds like you're referring to Phun and Algodoo — two interactive 2D physics sandbox simulators.
Here's a short text explaining them:
Phun was a popular, playful physics sandbox where users could draw shapes, create joints, and simulate real-world physics in real time. It was especially known for its fun, intuitive interface and creative community.
Algodoo is the more advanced, continued version of Phun (developed by the same original creator, Emil Ernerfeldt, under the company Algoryx). It adds better graphics, more tools, scripting with Thyme, and support for modern operating systems. Algodoo is widely used in education to teach mechanics, optics, and even simple robotics — all while keeping the "playful" spirit of Phun.
If you'd like, I can also write a short example scene description or give you a few lines of Thyme script for Algodoo. Just let me know.
(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
: Users can "draw" physical objects like circles, boxes, and polygons using a simple GUI. Specialized tools allow you to add to build complex machines like Rube Goldberg devices. Real-Time Simulation
: The software uses a powerful physics engine (based on the SPOOK linear constraint solver) to calculate interactions like collisions in real time as you play with your creations. Fluid Dynamics : Unlike many basic simulators, Algodoo includes a Smoothed-Particle Hydrodynamics (SPH) phun algodoo
method to simulate water and other liquids, allowing for experiments with buoyancy and hydrostatics. Optics Engine : A built-in engine allows for the simulation of light refraction through lenses of any shape. Data Visualization : You can generate live graphs
of physical quantities such as velocity, momentum, and kinetic energy vs. time. Scripting with Thyme : Advanced users can use the built-in scripting language,
, to program custom behaviors, event triggers, and complex logic for their simulations. Algobox Community
: A massive online repository (Algobox) exists where users have shared over 200,000 "scenes" that others can download and modify. Version History & Availability Version/Product Release Info February 1, 2008 Original name Algodoo 1.4 August 31, 2009 Rebranded release Current Stable (2.2.4) July 10, 2025 Latest update Algodoo for iPad Paid app ($4.99/£4.99) iOS/iPadOS Desktop Version Windows, macOS The software is also highly optimized for interactive whiteboards
and touch-screen devices, making it a popular choice for classroom demonstrations. , in Algodoo?
In the world of 2D physics simulation, (the predecessor) and
(the successor) aren't narrative games with a "story" in the traditional sense, but rather "sandbox" creative tools that have birthed a unique genre of community-driven visual storytelling. It sounds like you're referring to Phun and
Here is how the "story" of Phun and Algodoo is typically told through its community: 1. The Tale of Two Softwares The Origin (Phun):
It began as a master's thesis project by Emil Ernerfeldt in 2007. It was a free, playful 2D physics sandbox that became a viral sensation for its "phun" and easy-to-use mechanics. The Evolution (Algodoo): In 2009, it transitioned into
, a more polished, professional tool marketed for education while keeping the creative heart of Phun alive. 2. Community "Stories": The Rise of Physics Cinema
Because Algodoo allows users to build complex machines and "scenes," creators on platforms like
have turned it into a medium for physics-based dramas and comedies: Destruction Sagas:
Many popular "stories" revolve around extreme car crashes, giant gears, and elaborate saw-blade obstacle courses where the "hero" (often a simple car) must survive. Marble Races:
A massive sub-genre where marbles representing different countries or characters compete in long, dramatic "storyline" races across intricate tracks. World Building: Phun was a popular, playful physics sandbox where
Some creators use Algodoo to visualize entire fictional planets and ecosystems, complete with lore about different species and civilizations. 3. Key Creative Elements
If you are looking to create or find a "good story" within the software, creators typically focus on: Machine Building:
Using polygons, gears, hinges, and motors to build complex protagonists. Scripting:
Using the "Thyme" scripting language to add "events," such as a character talking or a bridge collapsing at a specific moment. Interactive Scenes:
Many users share their "stories" as downloadable scenes on the Algodoo Algobox , where players can participate in the narrative. start building your own scene, or are you looking for a specific video creator who tells these stories? Extreme Car Crashes - Phun Algodoo Best Moments
In 2023/2024, the software is technically "legacy," but far from dead.
Can you still get Phun? Yes, abandonware archives (like Internet Archive or GitHub) host Phun Beta 5.28. However, it will not run on modern MacOS (Apple Silicon) without emulation (Rosetta 2). Windows 10/11 runs Phun fine, but Algodoo is much more stable.
Traditional physics education suffers from what might be called the "tyranny of the abstract." Students are introduced to Newton’s laws not through the collision of pucks on ice, but through equations like ( F = ma ). The variable is clean, the calculation is precise, but the lived, felt experience of force, mass, and acceleration is absent. The Austrian physicist and programmer Emil Ernerfeldt, creator of Phun, identified this disconnect. His insight was revolutionary: what if the simulation preceded the equation?
Phun’s core innovation was its "penalty-method" solver, a mathematical approach that allowed for stable, real-time rigid-body dynamics on consumer hardware. But the true genius was the interface. Instead of entering values into text boxes, the user draws. A circle is created by a flick of the mouse. A hinge joint is placed by clicking two points. A rocket engine is painted onto a polygon. This haptic, immediate feedback loop bypasses the symbolic bottleneck. A child learning Phun does not need to solve for terminal velocity; they can build a box, attach a sail, and watch it fall, intuitively grasping the concept of air resistance before they can spell it. The software validates Jean Piaget’s constructivist theory: knowledge is not transmitted, but actively constructed through interaction with the environment.