The 20-year-old fashionista, who was able to bring smiles to many faces during her unexpected visit, called the little ones her "new heroes", reported E! online.
"Got to spend this afternoon with all my new heroes at @chocchildrens thanks to @ryanfoundation. These kids are so inspirational in their ability to find and show positivity, sense of humor, and personality regardless of their circumstances. My heart is so full today because of them. So much love," she wrote on Instagram.
"She was tired so we decided to take a nap before pics with mom. Best personality. Thank you @ryanfoundation & @chocchildrens for this opportunity and for everything you do to make the kids' days a bit easier," she captioned it.