Mattel is a global children's entertainment company that designs and produces toys and consumer products sold worldwide, including under big-name brands such as Barbie, Monster High, Hot Wheels, and Masters of the Universe. They sell their products online, in their proprietary retail stores, and through many other retail outlets or buyers. The company has its headquarters based in California and operates through three main segments: North America, International, and American Girl, catering to customers of all ages.