The website above is very handy, it brings up the 686 as the bus to catch.
$2.10 adult fare.
You could always do the cliff walking trail from Leura cascades two the 3 sisters - dunno on the capability of your kids though.
You can use your Opal card. And going on Sunday will be cheapest as it is capped at $2.50 pp. This would include the train and bus ride to get there and back to Sydney.Edited: 26 September 2016, 01:08
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