Xavier Collin/Image Press/Splash News Online
Abby Stern
October 17, 2016 01:15 PM

Kristen Bell‘s daughters Delta, 22 months, and Lincoln, 3½, are equally adorable. But when it comes to their personalities, they couldn’t be more different.

“One likes rules, likes telling other people the rules, likes staying in the lines, and the other is a cuddly bruiser,” Bell told PEOPLE Saturday at the Seventh Annual Veuve Cliquot Polo Classic in Pacific Palisades, California.

When asked if her girls had reached any notable milestones lately, Bell, as usual, had a very politically correct — and politically, period — response.

“Not really. They both walk and talk,” teases the actress, 36, adding jokingly, “They haven’t memorized the Bill of Rights or anything yet.”

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First daddy daughter swim in Lake Michigan-a right of passage for any Mitten baby ✋

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Her girls may be too young to recite the Constitution, but Dr. Seuss is another story — literally.

“We really love anything Dr. Seuss, and Oh, the Places You’ll Go! was a sentimental book for my husband [Dax Shepard],” she says. “His mom gave it to him when he graduated high school, and reading it with your kid, as an adult now, it’s profound. It’s really, really profound.”

When Shepard, 41, isn’t reading to their daughters, he and Bell are investing in strengthening their relationship.

“We’re very vulnerable with each other, but we’ve bypassed the discomfort in that vulnerability,” she shares.

I don't know how to use instagram but I do like this picture.

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And the acting couple aren’t afraid to seek help sometimes. “We go to counseling when we need it, and we check in with each other in a genuine way,” Bell says.

The duo “call each other throughout the day” not only to check in, but to plan their nights away from the kids as well.

” ‘How are you feeling, do you want a date night as much as I do?’ ” she describes.

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