This Christmas Eve, Kim Kardashian and her little sis, Kendall Jenner, took a break from the busy job of, well, being super-famous Kardashians, and stopped by Children’s Hospital in Los Angeles to visit with kids there.

On December 24, Kim posted a photo of she and Kendall leaning over the bed of one little patient. Both are wearing soft yellow cover-ups, and Kendall has a blue mask covering her mouth. Kim is busy chatting with the child, whose face is just out of frame. There’s a picture book on the bed, so the girls may have even been reading the patient a story!

“Playing peek-a-boo with this little cutie at the LA Children's Hospital with @kendalljenner,” Kim wrote.

Kim then shared a photo of she and a sweet little toddler showing off a peace sign for the camera. Kim’s even showing off her signature duck-face pout, a facial expression that her new friend is trying to copy! (Just look at the girl’s pursed little lips. It’s adorable.)

Finally, Kim posted a pic of she and Kendall and a whole group of hospital workers. “Thank you LA Children's Hospital staff for all you do for these children! You are heros!” she wrote. Kendall posted the same photo, writing, “thank you to the LA children's hospital for allowing us to visit today. #BestWishes #MerryChristmas”

Fact: Having to spend Christmas in the hospital would suck. Also fact: Getting a surprise visit from Kim Kardashian — and personal duck-face posing lessons from the world’s foremost expert — would probably make it suck a whole lot less.

Sources: Kim Kardashian and Kendall Jenner on Instagram

Beth Douglass is an Associate Editor at Wetpaint Entertainment. She's our resident Glee expert and loves celebrity kids. Follow her on Twitter and Google+!