In a magazine interview Obama and his wife Michelle revealed that one of their steadfast house rules is not giving Christmas or birthday presents to Malia, 10, and Sasha, seven. The couple explained that they spend "hundreds" on birthday slumber parties and want to "teach some limits". Santa Claus is still permitted to deliver seasonal gifts however. The girls are also given an allowance of just $1 (50p) a week for performing household chores, according to People magazine. Those chores include making their own bed, setting and clearing the dinner table and putting themselves to bed by 8.30pm. On the...