Smiley Face Marble Rings, Hungarian Rings, Marble Fun

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Marble Rings, Hungarian Rings, Marble Fun Marbles can be used to create intricate patterns and engage students in math class. Two circles overlap each other, forming two interconnected tracks known as Hungarian Rings or Devil's Circles. Students can insert marbles through the central openings, which will then roll around. Various questions can be asked when using multiple colors; otherwise, it is enjoyable to watch the marbles spin and create chaos. Once inserted, marbles are difficult to remove from the tracks. Four Marble Sizes The set includes four marble sizes (12mm, 14mm, 16mm, 18mm). The central openings vary in size according to the marble size. A 1mm tolerance allows the marbles to roll smoothly around each other. Marbles come in irregular sizes; experiment with different combinations. Reference: https://ruwix.com/twisty-puzzles/hungarian-rings-sliding-puzzle/