There is fun for all ages on a Sunday!
So if, you have a swing set, in your back yard, go out there anytime night or day and get on the swing and go as high as you can without flipping over.
Do it for the fun of it as you can't do it for any other reason but to have a blast.
If you don't have one in your yard, go to the park and get on the ones they have there - they usually are decidedly stronger than the home ones.
It is fun to ride a swing with a partner as well and compete for who can go the highest or who can go the fastest.
I almost got killed once when the whole rig got uplifted from the ground and fell forward crashing the whole deal all around the yard.
I was laughing so hard I didn't notice that I was cut on the leg a bit - so what it was a ball!