Jan. Why go through all that hassle? Why not make up a female character, in more modern times, raised in the rainforest. As "Jan" grows up, she and the animals could thwart the logging companies and save the environment. Why use someone else's much used material. Come up with a fresh, new spin.
It is still copyrighted material, and would require permission from the publisher. Your alternative is to tweak the story enough to make it unrecognizable, but if you're going to do that, you might as well start from scratch with your own amazing idea.