When you are first in such heat it also has a mental effect on you. So try to stay cool both physically and mentally. Sometimes in the heat you need to count to ten more often than in the cold!
I'm an amateur stargazer. if you head out of Perth a little bit the night sky will take your breath away. I'm out past York a lot and on a clear night the stars are just astonishing
Just be aware that taxis in Perth are a nightmare and on NYE they are even worse. Last time I tried to get one I didn't get home till 4AM (after finishing partying at 1AM) and I was lucky to get a taxi at all!
So try and prebook something or go somewhere you can walk to.
I wouldn't be without it but my advice would be to use it when you really need it and don't have the inside like a fridge as I find that, when the difference in temp is too great, you never get used to it being hot outside.
Into the Wild is a great film. In a similar vein check out Grizzly Man by the brilliant Werner Herzog (its a documentary). If your son is struggling with that song tell him to check out a website called ukulelehunt as there is a slightly easier version transposed there. Also check out a website called scorpexuke which is a guy in Oz with loads of great songs to play. Sorry not meaning to hijack a movie thread with Ukulele guff!