Our one and two dollar coins are a gold colour but different sizes, the one is smaller than the two. Many little events call for a gold coin donation... you can choose. It works. I quite like the coin thing. The paper currency was invalid on x day and the one, two and five cent coins were phased out over quite a long time. Shame about the one cent pieces... they were exactly the same size and weight as a US dime. I seem to remember buying the local paper whilst visiting the states for two cents (am I dating myself here?).