Two Days with Two Grandchildren

This raises a variation on the old test question: If two grandchildren can wear out two grandparents with two cameras in two days, how long will it take for three grandchildren to wear out one grandparent with no cameras?
We took Julia and Abigail downtown for two days (Jacob would have come as well, except for a bout of stomach 'flu.) We had a busy two days - Spertus Institute, the park, Chinese dinner, and the Field museum. I amused myself by switching the D300 with the Tokina 16-50mm to P mode with Auto ISO and firing away. The combination is great up to ISO3200. Don't worry - if you don't know what that means, you also don't care. For those who care, the Raw images were processed in Lightroom with default Noise Reduction. I did mess with other parameters, obviously. This small set is edited down from about 170 originals - the rest are only for the family:-) A few are G9 - obvious from the aspect ratio.