To expand on the other replies, here is a list of animals whose young are called "kits":

https://en.wikipedia.org/wiki/Kit#Animals

A baby beaver is called a `kit`

As the other commenter said, Kit is the name of a baby Beaver.

The welsh for child is plentyn, if you were interested.

Five times in the article! One additional in title. One more in a caption. Seven mentions! I know a baby barber is called a kit, but this is ridiculous!

Funny note: Kits are born fully developed. They’re basically like little copies of their parents. Very cute.