That is a great thought Isis, but honestly don't be in a rush. When they start to read on their own, and maybe third or fourth grade would be a perfect time to introduce some mythology. Before that, there is so much for them to explore. Magic, and the thrill of they all lived happily ever after, a time when all things seem real and possible. When they are a little older, it would be the perfect time for them to be introduced to some myths, and it might even help them to enjoy reading.