"There are no libraries here and its become an expensive proposition for me!"

Hi Dali! Where do you live? Your daughter is gifted! You are lucky to have the help of a nanny!

My advice is to continue to explain everything and speak to her as if she were in grade school rather than a toddler.

If you don't have many books available, maybe you could write short stories for/with her.

This age is somewhat easier than what's in store as she begins school. Try your best to follow her pace!