We're Harry Potter fans here, too! My 5 year old son fell in love with them a few months ago. He got my husband and me hooked, too, and for several weeks we were snuggling up near each other and trading the books. (I was worried that he was too young for the scary parts, but I was more stressed out than him!) We're homeschoolers, and our charter gave us some great HP language arts portals which led to fabulous creative writing projects.
We're going to Universal next summer. I hope he's still into HP then, because it looks really fabulous!
