Kaboom was the name of a vitamin fortified, circus-themed breakfast cereal produced by General Mills, which contained oat cereal bits shaped like smiling clown faces and marshmallow bears, lions, elephants, and stars. Its mascot was a smiling circus clown. It originated in 1969. Known primarily as a breakfast cereal of the 1970s and 1980s, Kaboom remained available for sale until 2010 when it was discontinued by General Mills.