Whoever says playing video games is a waste of time hasn’t seen this informative video: How to Use Video Games To Improve Your Brain. While mental exercise games like Nintendo’s Brain Age might seem as appealing as doing your math homework, some games can actually flex your brain muscles and still be fun.

Armadillo Run is a puzzle game that incorporates the laws of physics. You have to build a Rube Goldberg-like machine to transport an armadillo (which looks an awful lot like a basketball) to a target area using all types of materials such as metal, rope, rubber, and rockets. The game accurately models the behavior of the different materials so you’ll be learning about tensile strength, gravity, and tension without even realizing it. You can read a review of the game and view a demo at Fun-Motion.