My kids beg me to go to the park every single time I pick them up from school.
(Partly because I don't usually pick them up. Imperfect Mom does. So, if I do, we are obviously going to do something awesome.)
Most days I say something like, "No." Possibly, "Not today." And occasionally, "When do you honestly think I have time to go to the park? The house is a disaster and since you obviously aren't planning to help me pick up your toys I have to go through them and throw at least ninety percent of them away 'cause I am sick, SICK I tell you, of picking them up myself and then being put on a guilt trip for not having time to take you to the park!"
But yesterday was lovely and I was heading out to pick up then kids when I thought, "Hey, I bet the kids will ask to go to the park and I might be able to handle that kind of outing today. The house is so trashed that another three hours won't help." At which point I threw in a thermos of ice water and a bag of crackers along with my stroller.
The whole time at the park the kids play well and hard. I feel better just being outside, plus I walk a few laps around the walking trail that runs beside the playground. We all come home in better moods and hungry and exhausted.
And I wonder, "Why don't we do this everyday?"