By jdubble07
(2019-04-25)Richard Knerr was co-founder of Wham-O which invented the Hula Hoop, Frisbee, Slip 'N Slide, Super Ball, Trac-Ball, Silly String, Hacky Sack and Boogie Board.
Richard Knerr was co-founder of Wham-O which invented the Hula Hoop, Frisbee, Slip 'N Slide, Super Ball, Trac-Ball, Silly String, Hacky Sack and Boogie Board.