As kids movies of that era go, its unspectacular, but also harmless, charming and agreeable. Lets put it this way: The phrase "a fine howdya do" is spoken without irony.
Marshall Thompson (It! The Terror from Beyond Space) is Dr. Tracy, the veterinarian in an African village whose natives fear a lion. But its Clarence, the cross-eyed lion, whose ocular handicap makes for broadly comic scenarios, such as when he pulls the docs jeep into the lake. Oh, silly Clarence, you king of the jungle! King of the bungle is more like it!
Your kids wont care a lick about the storys pesky humans; its the animal antics theyll appreciate, like the sight of a chimp honking a car horn, or a man terrified by a snake, or Dr. Tracy wrestling a fierce leopard. Many other of Gods creatures are glimpsed via stock footage of varying quality, from great to vacuum-filter dingy.
Just warn them that the movie contains the worst rendition of "Danny Boy" their ears ever shall bear witness to, which is the comic intent of director Andrew Marton (Around the World Under the Sea).