What are some small gifts I can ship to an overseas friend (in Australia) that are unique to America?

A dear friend of mine is in Australia (after moving from London) and just for the fun of it I want to send him a small (small) box of unique gifts. I have considered local chocolate samples & crayola crayons, but I am drawing a blank after that. Are there some people who have traveled and can clue me in on items that aren't easy to find in Australia?