We come to this parl a lot- it has an accessible swing, and a splash pad, and several slides, and while it has no bathrooms, the library next door does. We moved to Pittsburgh a year ago and as a Disabled cacher who cannot drive, I want to bring geocache joy to other public transit users like me! Bring your own pen! It's in a ziploc bag incase of weather, but I think it'll be okay!
We always joke that money found at caches is Geo CASH for gas. SO I left a nickel. Small swag like erasers and change would work. Pack a picnic and plan to stay for awhile. Muggles should be too busy on the fields and playgrounds that they may not notice you grabbing this.