You didn’t ask for this…but another nice option is a walk in the woods while the kid is at the party. The adventure park is surrounded by a state park and land owned by the Sandy Spring Quaker community (the school and the retirement community). The Underground Railroad experience trail runs through all of that, and it’s a nice low key hike in the woods and fields.
Or you could climb, too - I’m 50 and still love going there to climb. It’s big enough that you can stay out of your kids way so you don’t embarrass them.
