It is free to download and play, but this version runs only on ARM processors. So if you have a Raspberry Pi or some other machine that runs a version of Linux

It is free to download and play, but this version runs only on ARM processors. So if you have a Raspberry Pi or some other machine that runs a version of Linux on a device with an ARM processor, you're good to go. These machines are generally slow and have limited RAM and disk space, and Minecraft Pi doesn't have the functionality of the full version, but it's free. I have a Raspberry Pi and I may look into Minecraft Pi to see how it looks as way to get young kids started with "programming". For kids who are already into Minecraft it looks like the Python API is a good way to get their feet wet.