We visited Greenwood Furnace 2 weeks ago! It is one of the most peaceful state parks we have been to in PA. The park is great for kids. Paved roads so they can ride their bikes. There is a nice park for the kids to play. The blacksmith shop was very educational! Great trails to hike! You can pick up a compass at the ranger station and complete a compass course! Beginner course available! Don't bring your electronics you won't need them here! No cell phone reception unless you drive a few miles down the road to a cute little store called Couch's! Great food if you don't feel like cooking on the fire one night, but who doesn't love food on the fire! Close enough to State College if you want to experience or tour! Your are also close to Penn's Cave. Cavern tour in PA in a boat! Right near the Rothrock Forest which also offers awesome trail runs! Happy camping!!