Chahinkapa Park is a pretty neat place! The sculptures are interesting, it's peaceful, and there's a shelter for use. PLUS there's the added bonus of being able to see the Zebra and White Rhino enclosure to Chahinkapa Zoo from the berm.
There is a playground down the road that is walkable with swings, a couple of lakes to watch ducks and geese, and the basketball court/ice skating rink is just a little further past the playground.