ZOOM . zingers | PBS Kids

From Roberto, age 16 of CA:

HERE IS A MIND READING CARD TRICK. You will need someone to act as your assistant for this and a friend to amaze! Have your assistant leave the room during the first part. Nine cards are laid out, face down, in three rows of three. have your friend select a card and let you know which one. Once a card has been selected, have someone call your assistant back in. When the assistant returns, he will be able to find the selected card!

Answer below...

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When your assistant returns you are holding the rest of the
deck in your left hand. Your thumb will represent which card
was chosen. Example: if the spectator chooses the card in
the middle, your thumb would be directly in the middle of
the deck. You will have to do this once for the row the card
is in, and again for the column. So your assistant can first
say what row the card is in and once this is done,
you can move your thumb, if necessary, to indicate which column it
is in.
The trick is to be VERY DISCRETE when holding the
deck. Shuffle the deck a little so as not to draw attention
to yourself. Keep a serious look on your face,
and stare at the assistant, as if you actually had ESP.
Let your assistant reveal the chosen card.

not yet implemented