Wham-O - Wikipedia
Wham-O Inc. is an American toy company headquartered in Carson, California, United States.They are known for creating and marketing many popular toys for nearly 70 years, including the Hula Hoop, the Frisbee, the Slip 'N Slide, the Super Ball, the Trac-Ball, Silly String, the Hacky Sack, and the Boogie Board.