Australian dollar
Australia has often made special 50-cent coins. The first was in 1970, to honour Captain Cook finding the east coast of  Australia. In 1977 a coin was made for Queen Elizabeth II's Silver Jubilee. In 1981 a coin was made for the wedding of Charles and Diana. The Brisbane Commonwealth Games had a special coin in 1982. Another one was made for the Australian Bicentenary in 1988. There have been many more special coins made since the 1990s, including special 20-cent, one-dollar and two-dollar coins. They are popular with people who collect coins.