Lake Manawa State Park has a fantastic playground that was built in 2018. It's known as the Dream Playground and is the largest ADA accessible playground in Iowa.
The playground is next to a very large parking lot, as in a triathlon was staged in the parking lot and there was still plenty of room to park. There's also a shelter near the playground, which has restrooms behind it.
The entire playground area is fenced with two open entrances, and the play area for kids 2-5 is in a separate enclosed area.
I love all the local history that's reflected throughout the playground, from the Squirrel Cage Jail to a Union Pacific train to a Lewis and Clark boat. Informational signs are posted near each.