Dot and the Kangaroo (1977)

An Australian girl gets lost in the Outback, but she's befriended by a kangaroo who gives her a ride in her pouch as they search for the girl's home. Aiding the pair are musically gifted koalas, platypuses, and kookaburras in this film based on Ethel Pedley's 1899 children's book, with animated humans and animals superimposed upon a live-action background.