What is a simple school-holiday idea around the Shire?

For family activities around Sutherland Shire, start with the suburb and the real reason you are asking, not a broad directory search. Useful local examples to keep in mind include Bundeena, Cronulla, Engadine, and Caringbah. Useful local reference points include Cronulla foreshore, Miranda, Gymea, and Sylvania. Ask whether the option is close enough, open when you need it, easy to contact, and specific enough for your situation. If the question is about a place, check parking, transport, opening hours, and current conditions; if it is about a service, check availability, experience, and the next step before shortlisting.