Tina Knowles Shares Rare Update on Beyoncé and Jay-Z’s Twins Rumi and Sir

focusing on art and fashion.

“Rumi is amazing—an amazing artist, painter and creator,” Tina gushed to E! News’ Francesca Amiker during the Kentucky Derby. “How could they be anything else growing up in that environment? All we talk about is creativity and fashion.”the House of Deréon designer described him as “very, very smart.”

“Sir is very quiet,” Tina noted, adding that her grandson “does all of the numbers stuff, so he’s not into fashion as much.”

And the twins are already well on their way to success. After all, Rumi recently made history as the youngest woman to chart on the Billboard Hot 100 for her feature on Beyoncé’s”We’re from Texas,” she said. “We’ve been part of that culture for a long time and I was very excited about it.”

Calling Cowboy Carter a “nice history lesson” for fans,” Tina added of Beyoncé, “She has this way of doing things subtly but educating, and so I’m really proud of that.”

For a closer look inside Rumi and Sir’s lavish world, keep reading.