If you've had a long week, and you're tired to the bones, and your mind won't stop spinning with all that is on your plate... If you're working at the computer, even if it's something important, and even if the hours in the day are too short to do it all, if you're busy, occupied, tied up... even if you're all these things at once, and a little voice from behind you says, "Mama, will you play Go Fish with me?".... do it.
Drop everything and run, don't walk, to the floor with that child, and play Go Fish like you're five years old again.
It'll be worth it. I promise.