Tyler Ludwig, 8, left, and Aidan Thiele, 6, prepare to compete
Monday during a session of the Speed Stackers Club at Roosevelt Elementary School in Willmar. The after-school club grew out of a popular physical education program and helps build dexterity, hand-eye coordination and concentration. (Tribune photo by Gary Miller)
Start with 12 plastic cups. Use stacks of three, six and three cups to make and dismantle a series of pyramids until you are left again with the original stacks, the 3-6-3 combination.
Sound simple? Try doing it in 14 seconds.
The Speed Stackers Club of Roosevelt Elementary School in Willmar would be happy to demonstrate how it's done.
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