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NO Memorization!
You display seven small plastic cards, each has a variety of numbers printed on them.
Ask someone to think of their age as you deal the plastic cards to the table.
And they ’SAY YES’ if their age in somewhere on one of the 7 cards.
You do not even look at these cards as you deal them.
When all 7 cards have been dealt, you name their age!!!
A very clever principle has been adapted to cards.