Seems to be really popular.

If it were me w/ young kids I’d hit up the thomas the tank engine, then skip queenscliff, head to point lonsdale, fish n’ chips place opposite the new playground (also very popular w/ kiddos), and if you time it right w/ the tide and weather the rockpools and war bunkers near the lighthouse (also extremely popular w/ kiddos). Queenscliff itself is a bit boring for kids.