We went to Dayton and walked around the National Museum of the United States Air Force, which is really cool. Hundreds of planes and jets and missiles and stuff. So much to see - and so much walking! We're all exhausted. Si has a bad cold, too, which I didn't realize. You know how you never know if it's just allergies or sniffles or what . . . but we tired him out so much today that he was pretty bad tonight. Hopefully a day of good rest tomorrow will leave him ready for school and his friend's birthday party Monday night. Sigh.