Well, the letters aren't from Hogwarts, but they're just as important!!! Unlike Harry, we've been expecting these letters for a long time. They're finally here!
Aidan will be in Mrs. Throop's 3rd grade class, and has quite a list of materials to assemble before school starts.
Esme will be in Mrs. Morrell's every-day half-day morning kindergarten class, which I think is probably the best possible scenario. She'll go to her orientation with Mom and/or Dad on the first day of school, for an hour.
Whoo-hoo! We're so excited!