The Littles (1983)

"The Littles" is a captivating animated series that shadows the unusual adventures of 13-year-old Henry Bigg. On vacation, Henry stumbles upon a suitcase housing a remarkable secret – the Littles, a family of mouse-like beings living within. The Littles are a tightly-knit clan comprising William and Lucy Little, who nurture their trio of children - Dinky, Tom, and Lucy, in the bustling yet miniature world they inhabit. Dinky, at 21, is the eldest, a lovable goof with a knack for piloting and an unending desire to assist Grandpa Little in myriad tasks, filling the day as his parents are at work. Tom, a 13-year-old ball of excitement, and Lucy, the youngest and tiniest at 10, brimming with an eagerness to participate, add their unique flavors to the family dynamic. The second season brings a breath of fresh air as the Littles family grows, adopting Ashley, a short-haired girl thirsting for the unending thrill that life with the Littles promises. As the series unfolds, the Littles navigate their extraordinary existence, ensuring the viewers are hooked on their tiny yet grand adventures.

The Littles is an anime show.

The Littles is currently streaming for free (ad-supported) on Pluto TV and it's also available on Hoopla.

It is also possible to buy The Littles on Apple TV and Vudu.