Sending a parcel to a digger overseas is a piece of cake. It's even easier than buying a birthday present for your mother-in-law.
Here's step 1:
Go to a post office. If you have no idea how to find one, try this post office locator. Most are only open 9am to 5pm, Mon to Fri, so if you are a wage slave, I suggest you find one near work.
Look around the walls of the post office until you see some shelves stacked with poster tubes, CD envelopes and shipping boxes. Go to those shelves.
Choose a BM sized box. If you think you will have trouble remembering the size, think BUM - as in BuM. Alternatively, a BM box is about the size of a shoebox. Think shoes and BuMs - you can't go wrong.
Pay the nice man or lady at the counter $2. That's for the BuM box. You can save time later by asking them for a customs slip - but if you forget, don't worry. You'll just have to fill one out when you bring the box back.
Now take the BuM box home and leave it somewhere where you'll trip over it - that will remind you to fill it with goodies and then return it to the post office for sending.
That's all you need to do for starters. Get a $2 box. Take it home. We'll take it a step at a time from there.