It is always interesting to see where you can find never before seen artwork and photos from Disney films. In recent years French publisher Hachette developed Disney character booklets (just under 30 pages) combined with dimensional figurines. The books are full of behind the scenes infos and visuals.
This one is just about Mowgli and Kaa.
A cel from a Frank Thomas scene and a Ken Anderson sketch.
Milt Kahl's animation drawings and a story sketch by Bill Peet.