KATE Middleton will mark her 42nd birthday today with homemade gifts from her three children and a birthday cake courtesy of her mum Carole, we can reveal. The Princess of Wales is expected to spend the day celebrating with husband Prince William, their children Prince George, 10, Princess Charlotte, eight, Prince Louis, five, and the Middletons at her childhood home in Bucklebury, Berkshire. 8 Kate Middleton turns 42 today and is said to be spending the day at her childhood home in Bucklebury Credit: PA 8 The Princess of Wales will be celebrating with Prince William, Prince George, Princess Charlotte...