If there is a cooker, you can make porridge using the cooker. But your boy may be old enough to try soft rice in December already. So, you can use the cooker to make soft rice. You can also bring some rice cereal (if your son likes it) for your boy to eat when you don't have much time to prepare porridge or soft rice. Just add some fruit, vegetable or steamed fish etc. into the rice cereal.
you may try "Gerber Single Grain Rice" - which contains 6 packs per box. My sister has tried it when their whole family travelled to Australia. I think you may bought them from Toysrus.