X17 EXCLUSIVE - Brad And Angelina Celebrate Zahara's Birthday With Wax!

Brad Pitt and Angelina Jolie went all out for daughter Zahara's 7th birthday party on Sunday at their Los Feliz home ... hiring a company called Wax Hands to make moldings of all the kids' hands at the celebration.

We definitely give the A-list couple props for being so creative!

Just last week, the mama of six was seeing at a Los Angeles party supply store stocking up on goodies for Zahara's big day. Of course, Angie also splurged on a couple of toy guns for sons, Maddox and Pax.

Our photographer on the scene tells us the party was "very low-key" and no celebrity friends attended.

The actress gave some hints about Z's birthday bash when she told Us Weekly at the Palm Springs Film Festival, "She's an African American girl, so we make sure that's a part of anything she does. So that will be a part of her day."