A View-Master is a hand-held toy used to view three-dimensional images from a series of slides on a paper disc. View-Master was first introduced at the New York World's Fair of 1939, originally intended as an alternative to the scenic postcard. In the late 1960s, the company phased out scenic views and featured more child-friendly subjects, such as toys and cartoons. The company has changed hands a number of times, passing from Sawyer's, Inc., to General Aniline & Film (GAF), then becoming an independent company, View-Master International Group. View-Master was purchased by Tyco Toys in 1989, which then merged with Mattel in 1997. View-Master is now marketed as a Fisher-Price product.