The 37-year-old supermodel is good friends with David and Victoria Beckham. She said their sons, Brooklyn, 12, Romeo, eight, and six-year-old Cruz, are brilliantly behaved.
She told The Mirror, 'They're so polite and well-spoken, it's amazing. The other parents stand there in awe listening to the boys speak so politely and correctly.
'David and Victoria have made sure they always say their pleases and thank yous, and definitely no swearing is allowed.
'Our kids all play together and I must say Victoria's boys are a pleasure to learn from.'
Victoria is currently expecting a baby girl and Klum said she is probably as excited as her friend.
'Victoria and I are so excited. She always wanted a girl, so it's incredible her biggest dream has come true,' she said. 'She is going to have the most stylish little girl, decking her out in Spice Girls' clothes with the biggest selection of her designer handbags to play with.'