Family day at the pool! Hot mama Kourtney Kardashian rocked a bright yellow one piece strapless bathing suit while playing at the Setai Hotel's pool in Miami, Fla., on Saturday, July 20, with beau Scott Disick and their two adorable children, 3-year-old Mason and Penelope, 12 months.

PHOTOS: Penelope's baby album

In the sweet snapshots, 34-year-old Kardashian is seen taking little Penelope for a swim, who's wearing an adorable pink ruffled bathing suit.

Dad Disick, 30, was also on hand for the family fun. In one photo, he's seen giving Penelope, who just celebrated her first birthday on July 9, a kiss on the cheek.

PHOTOS: Kourtney's body evolution

Big brother Mason, sporting red swimsuit trunks, was also having a blast -- jumping into the water and splashing around as his parents looked on.

As Us Weekly previously reported, the family recently celebrated Penelope's first birthday with a party on Sunday, July 14, at grandma Kris Jenner's house. Complete with approximately 150 guests and giant balloons from Geronimo Balloons ($150 apiece!), the day was one to remember for the E! reality star's family and friends.

PHOTOS: Adorable pics of Mason

"Happy 1st birthday to my sweet precious angel," the Keeping Up With the Kardashians star tweeted. "I can not believe it has been a year. Truly blessed."

This article originally appeared on Kourtney Kardashian Rocks a One-Piece Swimsuit, Plays With Kids at Miami Pool