When I was a student in elementary school (maybe 7 or 8 years old) my mother struck a deal with both my sister and I.
Given that we were average to good students, that we had good health, that we lived within walking distance to school, and that really, almost never missed school, once a year, we could not go just because. Maybe we wanted to stay home playing, maybe because it was rainy or too cold, or... I don't know, we just didn't want to.
It was a wise move, I saw then and see now. In one move she got ridden of the combined whining of two, taught some responsibility and gave herself some peace of mind. And I personally remember those stay at home days very fondly, watching shows on TV I'd only heard about, watching a movie on the VHS (a definite highlight), playing with my dolls or reading.
We're in winter break right now, a two week lapse when kids all ages don't have classes. Unfortunately I don't have a break (I might be able to use my yearly holiday, but we're encouraged to do that in January), yet, we're allowed to miss any two days. Just because.