A program for teaching children and adults the thinking skills most important in everyday life is described. This program, which has been tried out and evaluated in the United States, France, Germany, England, Australia, Japan, and Israel, is needed in every school and community as a "gymnasium for the mind," to help people fully use their natural intellectual potential, just as a regular gymnasium helps people fully use their physical potential. The program uses games to develop the skills of deductive logic, inductive logic, planning, remembering, creative thinking, problem solving, visualization, and communication. Most of the games use a kit containing number cards, letter cards, picture cards, shape and color cards, and a playing board. The kit can be bought or can be easily constructed. An example of one of the games--an abstract game of deductive logic--is included. Each kit game is presented at several levels from simple to more difficult and can, therefore, be used with various age levels. The publication ends by listing and answering nine commonly asked questions about the program. (Author/RM)