New Littlest Pet Shop Toys

pet shop
Kids' film about a couple of aliens who come to earth disguised as a Cowboy and Cowgirl and buy a pet shop from its owner in an attempt to try and eat some of earth's children for dinner.
a shop where pet animals can be purchased
A pet store or pet shop is a retail business which sells different kinds of animals. Pet stores also sell pet food, supplies, and accessories.

littlest
Small in size, amount, or degree (often used to convey an appealing diminutiveness or express an affectionate or condescending attitude)
Denoting something, esp. a place, that is named after a similar larger one
(of a person) Young or younger
Little is a surname and may refer to *Andrew Little (footballer), Northern Irish footballer currently playing for Rangers.
Littlest means very small.  You make the the word by adding -est to little.  When something is the littlest, it is smaller than everything else that's similar to it.  For example, the littlest monkey is smaller than the other three monkeys that are playing together.

toys
A person treated by another as a source of pleasure or amusement rather than with due seriousness
(toy) dally: behave carelessly or indifferently; "Play about with a young girl's affection"
(toy) plaything: an artifact designed to be played with
An object for a child to play with, typically a model or miniature replica of something
An object, esp. a gadget or machine, regarded as providing amusement for an adult
(toy) a nonfunctional replica of something else (frequently used as a modifier); "a toy stove"