Currently, my kids are 5 and almost 7. They want to be picked up, carried, flung and thrown as much as ever. When I sit them on top of my feet and “airplane” them like I did when they were just one-year old, they’d happily play until I couldn’t extend my legs anymore. I once played for 75 minutes —back and forth between them. I considered it my lower body workout for the day. When we finally stopped and I said I was going to make dinner, they begged me for more! I couldn’t believe it!
There is no end to the Parent Play Ground! Truly, no limits but your imagination and the stamina of everyone involved. 
Here are some games to start the fun:
-Be the limbo stick. Let your child quickly crawl underneath you while you lower or rise up out of a push-up. It’s pretty hilarious to “squash” them.
-Play “parent push-over.” Sit on the floor, engage your abs and lean back a little bit. Have your kids try to push you backwards while you resist. When they “win”, roll backwards and then roll up and start again. Think of “weebles wobble but they don’t fall down”.
-Try wheelbarrows together.
-Be a bridge, in a plank on your back (hips lifted) and let the kids crawl under you and on top. Give them a ride as you raise and lower your hips, or do push-ups. 
-Play “catch” and let them run toward you and leap into your arms. Feel free to swing them above your head or around in circles. I catch my kids mid torso rather than by their hands so I don’t hurt our wrists, elbows, shoulders and backs.
-Play “I’m gonna get you” and then pick them up and kiss or tickle them. I can’t tell you how popular this is.
Stay tuned over the next few months for many games to play. I broke them into multiple posts so they’d be easier to digest, try and internalize. Be mindful of your back, wrists and neck while playing. It’s easy to get distracted playing with your kiddo and forget form. Oh, and don’t really squash your kid! Unless their tweens and up. Then it counts as wrestling (coming in parent playground #2).