What a fun shopping day with mom!

On Sunday, July 19, Angelina Jolie took her twins Knox and Vivienne to Barnes & Noble in LA to buy them gifts for their seventh birthday — and the youngest Jolie-Pitt kids look more grown-up than ever!

knox and vivienne jolie-pitt
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Knox, Angelina and Vivienne on Sunday, July 19.

Last week, the 40-year-old actress and her hubby, Brad Pitt, 51, took Knox and Vivienne ice skating to ring in their birthday on July 12. Their four older children, Maddox, 13, Pax, 11, Zahara, 10, and Shiloh, 9, and a few of the twins' close friends also joined in on the festivities.

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“They rented a bus and headed for an afternoon of ice skating at Iceland Ice Skating Center. Knox and Viv were bundled up with snow hats and mittens. They were really excited about it," an eyewitness told Us Weekly of the fun outing.

Click through the gallery below to see how much each of the Jolie-Pitt kids have changed throughout the years!