Tumble Trax Magnetic Marble RunRecommended Age: 3 12 years old Create your own unique marble run then drop the marble from the highest point to see your design come to life. You may also make designs pictured on the activity cards. Make the marble stop, change speeds, or change direction by rearranging the pieces. 14 magnetic foam pieces, 4 marbles, 10 activity cards. Reason to Buy Run the gauntlet, marble! Run the gauntlet! We love this vertical marble run where the child can