Angelina Jolie took on her latest movie role so she could be a hero to her children.The Oscar-winning actress - who has four children, five-year-old Maddox,three-year-old Pax, two-year-old Zahara and one-year-old Shiloh, with lover Brad Pitt - provides the voice of Tigress in 'Kung Fu Panda'. She said: "I'm doing 'Kung Fu Panda'. I'm going to be a hero to my children.I'm the tiger and Jackie Chan's in it, so I'm so cool."Meanwhile, Angelina and Brad and three of their children went bowling with good friend Mariane Pearl and her young son Adam.The couple are currently holidaying in France and decided to treat the children and Mariane - who Angelina recently portrayed in the movie 'A Mighty Heart' - to an afternoon at the local family fun centre 'Le Palace'. However, the day almost turned sour when Brad slipped on one of the lanes and hurt his back.The centre's owner, Patrick Bernard, said: "The children don't have the strength to always get the ball down the lane, because it sometimes stops, so Brad thought he'd go down the lane to push it along. He slipped and fell on his back - hard!"My wife was disappointed when Brad was OK and she missed her only chance in life to give mouth-to-mouth resuscitation to Brad Pitt!" Brad and the three boys - Maddox, Pax and Adam - also played air-hockey,while Angelina and Zahara chatted to Mariane. Bernard added: "With only two lanes we're certainly the smallest bowling in France, so we're still having trouble realizing we spent Monday afternoon with the most famous couple in the world."Before leaving, Angelina and Brad personally thanked the Bernards - speaking a little French - and signed autographs for the couple's 15-year-old daughter.