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Head Work. Newest Games Research brain game was out last week with the double-take title: What's That on My Head? Each player wears a crownlike card holder on his head, into which an opponent inserts three lettered cards without letting the wearer see them (mirrors must be covered before the game begins). Winner of each round is the player who is first to figure out what his letters are from his own and others' responses to a set of questions that appear on another deck of cards. Sample: "Is there any letter that is more plentiful than any other? If so, on how many heads does it appear?" (If the answer is "e, on three heads," and the player can see all three, he knows that e is not on his head. If he can see only two, he knows e is on his head.) Some other questions: "What is the greatest number of cards you see of the same letter?" "How many letters have two and only two cards showing?"
Of course, there are always spoilsports who would rather devote their energies to something simpler—like figuring out their income tax.