The reality stars visited Children's Hospital in Los Angeles, where they visited with patients and spread some holiday love.
"Playing peek-a-boo with this little cutie at the LA Children's Hospital with @kendalljenner," Kim captioned one of the photos of herself visiting with one of the patients.
"Thank you LA Children's Hospital staff for all you do for these children! You are heros!" she wrote, along with another photo.
The girls posted a couple of pics from their Christmas Eve visit and it looks like they brought some much-needed smiles to these adorable children's faces.
In the photos, the girls are wearing sterile gowns, which help prevent them from bringing in any outside germs.
Kendall is wearing a mask in one of the photos, which might be because she said in a Keek video the other day that she was feeling a little under the weather.
Check out some more of the sweet photos from their visit below.