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Turing Tumble

Build marble-powered computers! See how simple switches, connected together in clever ways, can do incredibly smart things. Read more...

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Build marble-powered computers! See how simple switches, connected together in clever ways, can do incredibly smart things.

Turing Tumble is a revolutionary new game where players (ages 8 to adult) build mechanical computers powered by marbles to solve logic puzzles. It’s fun, addicting, and while you’re at it, you discover how computers work.

Discover how computers work

Computers are full of ingenious logic and astonishing creativity. They're everywhere, but most of us don't understand how they work.

With Turing Tumble, you can see for yourself how computers work: The logic isn’t hidden inside a computer chip, it’s right there in front of you.

Hands on, screen off

Have a blast learning to code in a language without words. Turing Tumble blurs the line between coding and building machinery. There's no syntax to learn, no abstraction, and no electronics at all

Great for educators

Kids learn best when they use their senses to explore new concepts. Turing Tumble teaches coding strategy as well as abstract concepts like binary, binary operations, and logic gates in a fun, tangible way. See for more.

The Parts

Build computers with six different types of parts.

  • Ramps - Directs balls in one direction, either to the left or to the right

  • Crossovers - Lets ball paths cross over one another. Balls come in one side and exit on the opposite side.

  • Bits - The bit adds logic. It stores information by pointing to the right or to the left, like a 1 or 0.

  • Interceptors - When the computer’s objective is complete, the interceptor is used to stop the computer from releasing any more balls.

  • Gears and Gear Bits - The gear bits are mind-bending, but they add a whole new level of functionality. They also make the computer Turing-complete, which means that if the board were big enough, it could do anything a regular computer can do (in theory!).

How to Play

  1. Select a puzzle - The goal of each puzzle is to build a computer that completes an objective. For example, below is challenge #1. The objective of this puzzle is to make all of the blue balls (and only the blue balls) reach the end.

  2. Build the starting setup - Many of the puzzles require parts to be placed in certain positions to begin.
  3. Plan your solution - Your job is to figure out where to put the "Available parts" in order to complete the objective.

What else can it do?

The only limit is the size of the board.

The Turing Tumble mechanical computer can do all sorts of things. It can:

  • count
  • add
  • subtract
  • multiply
  • divide
  • compare numbers
  • it can do logic
  • it can create patterns
  • and much, much more...

System Configuration

Turing Tumble comes with enough parts to build some impressive machines.


  • Computer board
  • Computer stand
  • 30 Ramps
  • 10 Bits
  • 8 Gear bits
  • 6 Crossovers
  • 4 Gears
  • 3 Interceptors
  • 1 Presser
  • Puzzle/comic book with 60 puzzles
  • 20 Red marbles
  • 20 Blue marbles
  • 30 Counterweights