Baby beavers are called kittens, or "kits" for short. Female beavers give birth to litters of two to five kits. Newborn kits stay inside their lodge for the first month of life.
Beavers live in a family unit for the first two years of their lives. Beavers typically mate and give birth to new litters every year. For this reason, beaver lodges usually house several generations of the animals at any given time. This works well for these animals because they are very social and work well together as a family unit. After two years, baby beavers are forced out of the lodge to begin life on their own.