Playgrounds and things to do with kids in Honolulu / Oahu
Diamond Head State Monument
Trail up the crater through a tunnel and stairs to big summit views, for kids who can manage the climb.
Honolulu Museum of Art
Art museum with galleries around open courtyards, free for anyone 18 and under.
Polynesian Cultural Center
Six Polynesian island villages with hands-on cultural activities and canoe presentations.
Waimea Valley
Botanical garden along a paved valley walk to a waterfall, with Hawaiian cultural sites on the way.