Origami is a cheap and fun way for both adults and kids to exercise some creativity. The end results are even better when you have really great origami paper to make them with. Where in Sydney can you buy some nice origami paper?
I like Daiso in the Mandarin Centre at Chatswood for origami paper. You can get really nice patterns and colours there, and it is always $2.80. They also have little instructional booklets that are bilingual and easy to follow. They can tend to sell out of their origami paper quite quickly though.