Bouchon Demo is a gear demonstration, demonstration the internals of Cube Bouchon. The yellow gear is alternately driven by the red and the green gear. When the red or green gear does not move, it is blocked by the yellow one. Between each alternation, there is a phase where all three gears move simultaneously.
Watch the YouTube video.
Read more at the Non-Twisty Puzzles Forum.
Please contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzling object.