High in the thick mangrove trees, a baby sloth clings to his mother. As he grows, the young sloth learns what leaves are best to eat, and where to climb the treetops to bask in the sunshine after frequent rains. But the sleepy sloth never leaves the safety of the trees. It isn't until his mother finally deserts him that the lonely young sloth must discover the world below all by himself.

As their nest becomes more and more crowded, the baby great horned owls stretch and flap impatiently. But they can't fly just yet. Even if one of them falls from the tree and must find its own shelter on the ground, the little one still depends on its parents' care. There are many weeks to go before the young chicks will be strong enough to fly away and find homes of their own.

The baby koala waits until she is six months old before she emerges from her mother's pouch. The baby isn't that curious about the outside world at first, but she's content to go along for the ride in Mother's pouch. Later she'll ride piggyback as they search the trees for the most tender eucalyptus leaves. But one day soon the youngster will have to face one of the greatest dangers in a koala's life - fire.

Born in a mountain cave in Alaska, three grizzly cubs wait out the winter with their mother. When spring finally arrives, the mother grizzly leads her babies down the mountain to the river. But the mother is wary; there are big male bears near the water, and they are a danger to her children. When they are older, the cubs will be ready to fish in the river with the adult bears. But for now they will retreat up the mountainside. There the cubs will absorb the lessons that will one day ensur...