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Tumble Trax Magnetic Marble Run Get critical thinking skills rolling! Create your own unique marble run with long, short, and curved magnetic pieces - ﾀﾔthen, drop the marble from the highest point to see your design come to life! Take the challenge to the next level by building the designs pictured on the Activity Cards. Engineering and problem solving have never been this fun! Endless combinations of designs provide multiple levels of learning. Includes 14 magnetic foam pieces plus goal, 4 marbles, and 10 Activity Cards. Longest pieces measure 10"L x 2"H. Grades K+ - Ages 5+ LER 2821