So what can be a casual app that utilizes this ability?
I remember the magic 8 ball for pseudo fortune telling.... "Magic" tricks to change a kids flash card may be fun too.
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Add maJong dice, and put an arrow to point to the player that would take the first block of tiles. Add a phrase like "9 yourself," and "11 across." This is useful if maJong players have the card version and no dice handy.