Smiley Face Marble Rings, Hungarian Rings, Marble Fun

thingiverse

Marble Rings, Colorful Circles, Marble Fun 'Tis the circle of marbles: Find your marble Zen! Marbles can be used to create geometric patterns and engage students in a math class. Two circles interlock with each other to form two overlapping tracks, also known as Hungarian Rings or Devil's Circles. Marbles can be pushed into the tracks through the openings in the middle. They will roll around. You can ask questions, especially when using multiple colors; otherwise, it's just fun to spin them and watch the chaos unfold. Once they're in, it's challenging to shake them out of the tracks. Four Sizes There are four marble sizes included (12mm, 14mm, 16mm, 18mm). The openings in the middle vary with the marble sizes. For example, a 16mm marble is shown in the figures. There's also a 1mm tolerance to allow the marbles to roll smoothly. Marbles come in irregular sizes; try them out! 16 mm Marble Rings The 16 mm version can hold 24 marbles, which can roll freely (as shown in one of the figures). Using four colors, you could play the Hungarian Ring Puzzle. Reference https://ruwix.com/twisty-puzzles/hungarian-rings-sliding-puzzle/