We have a week in Sydney at the beginning of April next year - me, dh, ds1 (5), ds2 (3) and my mum. What are the must do's (beyond bridge, opera house, harbour) esp with small children? How many days? Should we go to the Blue Mountains or can we do Alice/Uluru in a few days (how many is a few?)? Too much choice and not enough time...inside tips would be most welcome. (Funds are not inexhaustable as we are paying for everyone).