FYI -- https://www.kickstarter.com/projects/871405126/turing-tumble-gaming-on-a-mec... Turing Tumble: Gaming on a Mechanical Computer Build mechanical computers powered by marbles to solve logic puzzles. Escape planet Eniac and discover how computers work. Turing Tumble is a new type of game where players (ages 8+) build mechanical computers powered by marbles to solve logic puzzles. It's fun, addicting, easy-to-learn, and while you're playing, you discover how computers work. I'm all about teaching kids to code. When I was a professor at the University of Minnesota, I saw how valuable it is for all students to be coders. I have three young kids and I've tried all sorts of games to build their interest in coding. The problem is that they all treat computers like abstract, black boxes. They overlook the fundamental, most amazing concept: how simple switches, connected together in clever ways, can do incredibly smart things. Kids learn best when they use their senses to explore concepts. Turing Tumble is the only game that lets kids see and feel how computers work. The logic isnÂt hidden inside a computer chip  it's all right there in front of them. It builds logic and critical thinking skills, fundamental coding concepts, and grounds their understanding of computers. And adults, this game is not just for kids! It's a game unlike any you've ever played. It takes creative thinking to come up with a solution to each puzzle - you can't just stumble across the solution by trial and error - and it's extremely gratifying to build it and watch it work. Even if you're an expert programmer, I guarantee you'll find the latter puzzles a challenge. ... Also, this page has some animated gifs showing some of the mechanical logic at work: https://boingboing.net/2017/05/30/cool-marble-powered-mechanical.html