Responsible Kiddos! Twins Vivienne and Knox Jolie-Pitt Step Out to Buy Food for Their Pet Bunny

Unfortunately, the bunny didn’t make an appearance during this trip. However, we have no doubt that the little fluff ball was having a great time back home. After all, on July 29, Angelina, 44, took Vivienne to buy plenty of toys for her furry friend.

Considering the bunny is *technically* just Vivienne’s pet, it’s super sweet that her brother decided to tag along for the errand. Then again, the Jolie-Pitt siblings are super tight.

“The kids have a handful of friends,” a source told In Touch exclusively. “But because they’re homeschooled, they’ve formed an unbreakable bond. They really rely on each other.”

It’s relieving to see that despite Brad and Angelina’s somewhat tumultuous past, the kids have managed to rally. Unsurprisingly, the former flames couldn’t be more thankful for their brood. “They feel blessed to have such well-behaved, grounded kids,” the insider continued. “Quite a rarity in Hollywood!”

While all of their kids may be well-behaved and grounded, they do still have vastly different personalities. Take the twins, for example. The source explained that while Vivienne is “quirky,” Knox is “quiet” and “studious.” Hmmm, sounds like they balance each other out! How sweet.