Congratulations!
I'm so happy for you! Obviously, she's gifted. There is nothing wrong with teaching a kid to read using the Daily Racing Form so I'm sure you'll get started on that right away. Make sure she's well-rounded though--don't forget Haskin's columns and Bill Nack's, well, everything. You can use BSFs to explain numbers and Thoro-Graph takes care of negatives. Morning line odds with their fractions. This sport has it all!