Angelina Jolie visited a bookstore in Sydney with her kids on Friday. The group, which included Zahara, Shiloh, Vivienne, and Knox, stuck together, holding hands during the outing. The family is in Australia while Angelina works on her latest directorial project, Unbroken. She was spotted smiling on set earlier in the day but switched gears to family time, much like she did when she stepped out with twins Knox and Vivienne last week. Angelina may have a lot to juggle, but she isn't forgetting about her fiancé, Brad Pitt. His big 50th birthday is coming up this month, and rumors suggest that Angelina has gone all-out to celebrate by buying him a heart-shaped island near New York.