That program was . Today, it lives on as Algodoo .
So go draw a ramp. Place a circle at the top. Press space. And remember: physics isn’t a subject. It’s a verb. Have you used Phun or Algodoo? What’s the most ridiculous or brilliant thing you’ve built? Let me know in the comments—or better yet, share your scene file. phun algodoo
The community exploded. Suddenly, teenagers were building working gear trains, marble machines, catapults, and hydraulic lifts—all in a free, lightweight program. In 2008, the team behind Phun founded and released a polished, professional version named Algodoo (a playful mix of "Algoryx" and "Phun"). That program was
Let’s dig into the history, the magic, and why you should download it right now. The story begins at Umeå University in Sweden. A master’s student named Emil Ernerfeldt wanted to create a real-time 2D physics sandbox that felt like drawing on a whiteboard—only everything you drew obeyed gravity, friction, restitution, and density. Place a circle at the top
If you were a curious kid with a computer between 2008 and 2012, chances are you stumbled upon a bright, sandbox-style program where you could draw a circle, click "play," and watch it roll down a ramp you just sketched with your mouse.
Want a ramp? Scribble a line. Want a box? Draw a rectangle. Want water? Grab the fluid brush. Everything you create instantly has mass, collision, and reaction to forces.