Photo 1 of Marble Genius Marble Rails Super Set, 325 Piece Marble Run for Kids 8+ (45 Marbles, 15 Rail Pieces, 10 Base Pieces & More), STEM, Full-Color Instructions, Great for Kids & Teens

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Photo 1 of Marble Genius Marble Rails Super Set, 325 Piece Marble Run for Kids 8+ (45 Marbles, 15 Rail Pieces, 10 Base Pieces & More), STEM, Full-Color Instructions, Great for Kids & TeensPhoto 2 of Marble Genius Marble Rails Super Set, 325 Piece Marble Run for Kids 8+ (45 Marbles, 15 Rail Pieces, 10 Base Pieces & More), STEM, Full-Color Instructions, Great for Kids & Teens