Her first question as she approached the Warden's Watch was: "What's that grown man doing on top of the playhouse?"
It turned out that the grown man, Fred Weber, was watching a Short-billed Dowitcher, a Stilt Sandpiper and other shorebirds on the distant mudflats. The first two were both Celery Farm life birds for me. (Thanks, Fred!)
Elby also pointed out that the playhouse had seating for adults on top but lacked a slide.