Shoes were the difficulty when I was that age. My feet were a (US) size 10 by 4th grade, and my mother had quite a lot of trouble trying to find appropriate dress shoes without heels.

I've been meaning to tell you that I was finally able to get your books from the library, and I loved them all. I think it would be difficult for me to tire of anything even remotely Arthurian, but these were exceptional.