The Wishbone Bike Endangered Species Bells come in seven excellent colours and designs. The metal bells have a diameter of 3.5cm and have a secure rubber strap that fits most bikes. An easy hammer action makes the bell ring making it an excellent choice for young children. Each of the seven animals that feature in this edition are endangered. In each box there is an information card about the animal featured on the bell. This product is a WWF New Zealand collaboration and 55 cents from each bell will help save the Maui dolphins. Currently, there are just 55 Maui Dolphins remaining alive. These bells make a fantastic gift as they are packaged in a beautiful coloured box. If you have a colour preference please let us know in the comment box at check-out. Age guide: from 3 years.