June 08, 2016 01:45 PM

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Giuliana Rancic has quite the role to play aside from Fashion Police panelist: mom to 3½-year-old son Duke.

“We just got him a bike recently, with training wheels, and he loves it. He’s been zooming around the neighborhood on the bike,” Rancic, 41, tells PEOPLE exclusively.

Adds the television personality and wife to entrepreneur Bill Rancic, 45, “We’re in Chicago now and we have beautiful parks around us. So he’ll meet up with his friends and we’ll have mommy play dates with our kids. They all ride around on their new bikes and play at the park.”

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The proud mama adds that Duke loves playing baseball, but that he’s just as creative as he is sporty — particularly in the musical sense.

“I was just wheeling him around downtown Chicago in a wagon, and he just sings the entire time,” Rancic, who’s teamed up with Cottonelle for their Go Commando project, tells PEOPLE. “He loves music and loves singing. ‘Three Little Birds’ by Bob Marley is his favorite song and he just sings it all day long.”

And when it comes to what Mom does for a living, Duke is at an age where he’s starting to get it … sort of.

“When he sees me on TV, he knows it’s Mommy. And he points, and he asks Daddy, ‘When’s Mommy coming home from the TV?’ ” the former E! News co-anchor shares. “So it’s the cutest thing because he thinks I’m in the TV, and that I’m gonna come home from the TV.

“Kids at this age just want to know when Mommy and Daddy aren’t around, where they are. ‘Are they at work? Are they in New York? Where are they?’ ” she continues. “He’s always asking where we are when we’re not around.”

Rancic — who welcomed Duke with the help of a surrogate, and has been open in the past about her struggles with infertility, miscarriage and breast cancer — couldn’t be happier with their move to Chicago and says she’s committed to spending as much time with her son as she possibly can.

“The nice thing is we’ve really been able to spend a lot of time together as a family since moving to Chicago and really trying to find a better balance with work and family,” she explains. “It’s been wonderful.”

Jen Juneau with reporting by Nicole Sands

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