Dead easy stuff out the tip of Wahroonga rocks, ranging from about 5 to about 14, but if you're down south then maybe something at the Cathedral - Dr Claw may be able to suggest something. I find the big issue with Sydney climbs is there's often a reach problem at the start or finish which makes an otherwise excellent kids' route into a real disappointment (which reminds me, I must get the kids to do the first top rope ascent of the climb I found near the local netball courts)
The other option would be to duck down to Mt Keira and do something like Nursery. If they're OK on that there might be something with views on the South Face. The last time I was there there was a printed and laminated guide tied to a bolt underneath that section of the crag!