This is a beautiful scene of Mowgli animated by Ollie Johnston.
The boy and the bear have bonded by now, and Mowgli is singing along with Baloo about "The Bear Necessities" as the two of them float down a river.
No live action reference here, this is all Ollie. To me it is one of those scenes that seems detached from the animator. It looks and feels so natural and in character, you might think Mowgli is acting on his own. No animator attached. The ultimate accomplishment, real life on the screen.
Mowgli sings: "With just the bare necessities of life." Ollie chose the word LIFE as the main accent for his animation. So beautiful and personal.