ocr: PUZZLE ON CD YELLOWSTONE NATIONAL PARK PUZZLE ON CD offers 12 stunning images from the most famous National Park in the U.S. Solve and construct puzzles at your leisure. The PUZZLE ON CD series makes solving puzzles on your computer a snap. No more lost puzzle pieces, no more sorting by hand! -12 super high resolution game boards. The size oft the puzzles and the amount of puzzle pieces are selectable ranging from 25 puzzle pieces to 144 puzzle pieces. Realistic looking Select puzzle pieces with a special computer help system. Automatic sorting of the puzzle pieces according to color, brightne ...