The tale of Tarzan's misadventures as a boy as he searches for his true identity and the meaning of family.

When Sid's attempt to adopt three dinosaur eggs gets him abducted by their real mother to an underground lost world, his friends attempt to rescue him.

Tod and Copper still go together like an itch and a scratch, but when Copper gets a shot at the big time with a nutty group of hound dog howlers, their purebred friendship is put to the test.

Boog's friends rally to bring him home from a Russian traveling circus.