A game board device for directing body movements in games, exercise, or physical therapy. It employs a support frame of side-by-side modular units of relatively the same size and shape supporting a continuous matrix of contact surfaces supported in a common plane. The contact surfaces in the adjacent frames are arranged in a coordinated matrix of adjacent surfaces that are illuminatable in various colors. The contact surfaces are illuminated normally one at a time so as to cue sequential steps in a random pattern and at varying speeds in a game or predetermined patterns and adjustable speeds in exercise or therapy. Control of the sequential illumination may be manually or by a program by manually operated device or by computer. It is preferred that the individual frames be hindged to permit folding for storage and transportation.