We go to Blue Slide Park (in Frick Park) all the time. My granddaughters love it. It is crowded sometimes and my older granddaughter was bullied once by kids who seemed unsupervised (She was 3 at the time) but generally the kids are reasonably under some supervision. Covered picnic tables are nice. Bathroom is just a Jonny on the Spot type. And not very close to the playground. Lots of play areas for kids of various ages from the toddler area all the way up to older kids. The blue slide itself is variable. With the right cardboard (bring your own) it can be fast and fun but there were times when it was slow and sticky. The best cardboard has a slick coating, not just brown corrugated on both sides. It's a beautiful setting with trails for when you're tired of the playground. The well-used dog off-leash area nearby means you will see a lot of dog walkers which my little ones love, but a child who doesn't like dogs might not.