Even as a little girl, there were signs Lourdes Leon was destined to become a style-setter. "When she was very young, she knew how to put her clothes together," her dad, Carlos Leon, tells PEOPLE. "She had so much fashion sense."
And now the 13-year-old is sharing her taste with the world. Lola (the nickname she goes by) has teamed up with her mother, Madonna
, 51, to create the Material Girl clothing line, a juniors' collection for Macy's launching Aug. 3. Plus she's writing an accompanying blog, where she has shared her insights on clothing ("You can never have too much vintagy-thrifty looking stuff"), Mom's rules (when she turns 14 she can dye her hair: "THANK YOU MOTHER!!") and the lasting gladiator sandal trend ("I'm just like what????"). "I respect her taste, and I rarely disagree with her," Madonna
said recently. Lola's ambition "doesn't stop," says her father, who jokes, "Maybe she'll rule the world one day, like her mom."
- . With reporting by Suzanne Zuckerman/New York City.