If you don't know what Minecraft is, you probably do not have children in your life, at all, and/or you have never been on the Internet.
I play a lot of Minecraft in therapy (and since it's actually pretty fun, I consequently play a lot of Minecraft outside of therapy, too). I have my own world that some of my kids like to add to, or some kids prefer to make their own. You might think that two people looking at a computer screen is not great for communication, but Minecraft actually facilitates constant talking: problem-solving, questions, comments, jokes. Also cries of despair.
Minecraft can be quite challenging, depending on what you are trying to accomplish, and I often draw parallels for kids between Minecraft challenges and how these are similar to the challenges faced in stuttering.
Here are some of my favorite Minecraft-stuttering principles.
And, of course...