TAC-TICKLE is a sixteen-game kit that is as simple to learn as tic-tac-toe. The surface similarity ends quickly as learners discover the subtle and intricate sophistication of this deceptive little gem. TAC-TICKLE has been a favorite of computer programmers exploring the profound mathematical theory involved in adapting it to computerized play. The pocket-sized kit consists of a pair of playing boards, cubes and directions. Cubes fit into a molded foam playing board that holds loose pieces tightly making it an ideal traveling game for children and adults.