After tackling dogs, cheerleading, makeovers and oodles of food shows, Netflix has turned its attention to children and E! News has your first look at the aptly titled Babies.

“Babies are the ultimate mystery,” a voiceover says in the trailer, below. “They are much more complex than we ever thought.”

The new docu-series follows 15 international families that were filmed over the course of a year (the docu-series itself was filmed over the course of three years). The series explores the everything related to, well, babies, from helpless newborn to independent toddler.

Babies drops on Friday, Feb. 21 on Netflix.