Kendall Jenner Bikinis with Mason Disick During Family Beach Day (PHOTOS)

By: Gabrielle Chung / July 15, 2012

Kendall's Swimsuit Shoot
Kendall Jenner poses for 'FLAVOR' Magazine.
Kendall & Kylie Bikini
Kendall & Kylie Jenner hit the beach in Hawaii.
Kendall Jenner is taking on babysitting duties as sister Kourtney Kardashian is resting after giving birth to her new baby girl.

This weekend, the 16-year-old Keeping Up with the Kardashians star was spotted taking her nephew, Mason Disick, out for a family beach day in Malibu, Calif. Sporting a blue bikini, Jenner has a blast splashing in the water and tossing around a football with the adorable two-year-old.

It certainly has been a busy week for the Kardashians.

Aside from Kourtney, 33, welcoming her second child — Penelope Scotland Disick — last Sunday, Kim, 31, and Khloe, 28, opened a new DASH boutique in West Hollywood, Calif. this week.

Though the family is keeping busy with new projects, they’ve all been pitching in to help babysit little Mason while Kourtney takes care of her newborn baby at home.

Earlier in the week, Khloe took the cute tot out for a frozen sweet treat in Calabasas, Calif. She wrote about their little snack on her blog:

Spent the afternoon with Masey yesterday and took him to one of our favorite frozen yogurt spots. He’s so freaking cute it’s unreal!

Check out more adorable moments from little Mason on his beach day in the gallery, above.

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