Anything goes in an NZ business envelope

Don't suppose any of you kiwis out there would be interested in doing a Sender's Choice in a business envelope, the 22cmX12cm ones? I have watched all those lucky Americans stuffing their envelopes and sending them for a minimal postage. I have to admit to jealousy. So I want to try it. What can we get into a business envelope, fulled to just before bursting, for the price of a 50 cent stamp? Do I sound like a real miser? Oh yes.

I have thought of ribbons, embroidery cotton, postcards, fabric samples, stationery, paper, cards, stickers, beads(although those little beasts eat holes in the corners) and recipes. I am sure you have more imagination than I do. Any advice or suggestions gratefully received.