I don't think Pie Pie is quite old enough to read this series on her own yet. You have to make your own decisions about when the time is right for your kids to read certain books. We are planning on reading them together after we finish the Harry Potter series.
Don't worry if you are a grown-up, you can join in the adventure of Gregor too!
Young or young-at-heart, I feel these are books anyone can enjoy. They are filled with adventure, mystery, love, suspense and humor.
You may just find you have fallen in love with a rat too!
P.S. I want to say thank you to my friend Nola for suggesting this series to me!