Ditto on that with the 'AC filters in the window and wetting them.....If you don't have them on hand then hang wet towels in the windows.....or wet the drapes (if it won't get you in trouble with the family).

Keep hydrated....and that doesn't mean you can't do it it 'different' ways. Watermelon has a high water content, is refreshing and (some) kids love it. Italian ices or 'Flavor Ice" pops......don't forget those......

There are lots of ways......