We are planning a month's trip to Australia next Easter with our two boys (ages 5&7). We think we will be flying with Singapore Airlines stopping for two nights in Singapore. We then fly onto Sydney, Cairns (to visit the Barrier reef and the rainforest) then onto Perth and Denmark and then flying back to London from Perth with only a quick stop in Singapore. Any ideas of good things to do/visit in any of the above or advice/tips on the travelling etc?!