I think that identical twins are fascinating. They have the same DNA, but they've got different fingerprints and they often have different personalities, too. My sisters Katy and Sandy are identical twins, and my parents and I don't know which one is which most of the time. In fact, they always play tricks on us, which is so funny! They wear different clothes every morning, so we know who is who but then they sometimes change clothes later just to confuse us. There is only one thing that helps us tell who is who. Katy spends a lot of her free time reading books, but Sandy hates reading. She often complains about it, saying 'Katy is reading again!'