Description In Polar Bear Cubs, emergent readers follow polar bear cubs and their mother as they play, hunt, and swim in the Arctic. Carefully crafted text, high-frequency words, repetitive sentence patterns, and strong visual references support emergent readers.. .Polar Bear Cubs includes tools for caregivers as well as introductory nonfiction features such as labels, a table of contents, words to know, index, and review questions.. .Polar Bear Cubs is part of Jump!'s Polar Babies series.