Egg and spoon race. Hide ‘n’ seek. Treasure/scavenger hunt. Take cushions to play musical chairs/cushions

A party at a playground is also always succesful !

Bob’s and statues
Simon says
Under the limbo

Red rover is one that brings everyone together and you don’t need anything but the kids!

Red rov

We have some birthday party cookbooks and they include games and ideas; might be worth investing in some good books. I always use these books.

When I was younger the standard birthday games were scarecrow, red rover, red letter, what’s the time mr wolf. There’s no preparation necessary. Have pass the parcel because that game is fabulous at any age, and do a piñata if possible. Just remember you are at a park and kids will be happy to run, play and make up their own games. If there’s a playground they will have fun.

We love the game where you tie donuts to the clothes line and make the kids put their hands behind their back and whoever eats the donut the quickest wins a prize! Also pass the parcel or musical chairs

Yes I agree with the old style party games, we did that when our kids were younger too (like sack races, apple bobbing, egg spoon races, tug of war. Water balloon fights can be fun too

We have always loved and used old style games. They seemed to be loved by all generations. Good luck with getting some new ideas.