Kourtney Kardashian and baby Reign joins Khloe at LAX while dressing baby in Penelope's hand-me-down sneakers

Kourtney Kardashian and baby Reign joins Khloe at LAX while dressing baby in Penelope's hand-me-down sneakers

Her sister Kim Kardashian splurges thousands on designer outfits for daughter North.

But Kourtney Kardashian proved herself to be the canny one in the family on Sunday, as she dressed baby son Reign in his big sister Penelope's hand-me-downs.

The nine-month-old wore a pair of three-year-old Penelope's old animal-print sneakers as he joined his mother and auntie Khloe for a flight out of LAX.

Of course, this being the Kardashians, they were some fancy cast-offs – a leopard print pair by Polo Ralph Lauren.

The baby footwear, designed for girls, can be seen in an Instagram snap of Penelope's shoe closet, posted in January. They retail for under $100.

But while she's thrifty, Kourtney, 36, certainly didn't lower her stylish standards. Both she and Reign wore rock-inspired outfits.