Using your left and right hands with the same ease and skill; very handy when it comes to dribbling and shooting a basketball, using the computer, playing the piano, sport stacking and much more.

Michelangelo, Ben Franklin, Einstein, and more, were ambidextrous.

Equal performance on both sides of the body — to be able to use both hands equally well. It requires practice.

Become ambidextrous and along with physiological brain growth, a more balanced integration of your 2 hemispheres of your brain will be achieved.

Studies have shown that ambidextrous people are more emotionally independent, more determined, more adaptable to new situations and more apt to handle problems without giving up.

A specially designed plastic cup specifically made for sport stacking and approved by the WSSA and used in a sport stacking competition or event.

This is a sequence of stacks combining a 3-6-3 stack, a 6-6 and a 1-10-1 stack, in that order. Stackers conclude the Cycle with cups in a 3-6-3 "down stacked" position.

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A Stacker's division for individual or team relay competition is based on his/her grade level.

Term used for "unstacking" or putting cups down. (Hands may not be on two stacks simultaneously either in the Up Stacking or Down Stacking phase.)

Down Stacking must follow the same direction as the Up Stacking phase (i.e. if you "up stack" from left to right, you must also "down stack" from left to right).

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There are three types of false starts that can occur in the Team Relay Competition:

1) A lead Stacker's hand(s) leave the touch pads of the StackMat™ Competition Timer before the command of "Go" by the Official.

2) A subsequent Stacker's foot crosses the starting line before the hand tag.

3) A missed hand tag.

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1) In the Individual Timed Competition, a Stacker accidentally or intentionally stops the StackMat Competition Timer before the sequence is complete. (All cups must be down stacked and up right before the timer is stopped.)

or

2) In the Team Relay Competition, the StackMat™ Competition Timer is stopped prior to the fourth and final Stacker completing his or her sequence.

The ability to concentrate.

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A loss of a race and/or a match in a Team Relay Competition for interference and/or unsportsmanlike conduct. (This includes "unintentional" interference.)

The term used when cups fall during the process of Up Stacking or Down Stacking. (More about the three types of fumbles.)

Fumbles must be corrected properly. When a stacker fumbles a cup, only the stacker can retrieve it.

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An individual group of cups either up stacked or down stacked such as a 3 stack, 6 stack or 10 stack;

or

A specific stacking sequence, or pattern, involving a combination of individual stacks (e.g. 3-3-3 stack, 3-6-3 stack, Cycle stack).

3-6-3 shown

The term used to describe the order in which cups are upstacked and downstacked.

3-3-3: Cups are "up stacked" and "down stacked" from left to right or right to left (individual preference) in three stacks made up of three cups in each stack (3-3-3).

3-6-3: Cups are "up stacked" and "down stacked" from left to right or right to left (individual preference) in three stacks made up of three cups on the left, six cups in the center, and three cups on the right (3-6-3).

Term used for stacking the cups "up." (Hands may not be on two stacks simultaneously either in the Up Stacking or Down Stacking phase.)