Introduced in 1992, each set included an action, such as a movable part. Most included magnets or simple mechanisms, such as flapping wings. In 1985, General Mills spun off its Kenner and Parker toy divisions to form Kenner Parker Toys, Inc. Kenner Parker was acquired by Tonka in 1987. Under Tonka management, Kenner Products was reconstituted as a division. Tonka (including Kenner) was purchased by the toy company Hasbro in mid-1991. Hasbro closed the Cincinnati offices of Kenner in 2000, and Kenner's product lines were merged into Hasbro's
Whilst most Kenner Littlest Pet Shop sets are not rare, some are hard to find, including the foxes, deer, and swans. The rarest known set is the Pony n' Pet Stable Play set.