After their joint birthday party, Penelope Disick and North West decided to share their toys with other children

By Brittany King
June 23, 2016 06:30 PM

Kourtney and Kim Kardashian West are already teaching their young ones the meaning of giving.

North West, who turned 3 on June 15, and Penelope Disick, who turns 4 on July 8, wore matching costumes inspired by The Little Mermaid as they partied with the rest of the Kardashian-Jenner clan this past Saturday. Complete with shells on their tops and full tails, the adorable pair did something amazing after the event.

“North and Penelope donated a truck load of My Little Pony’s to the Los Angeles Children’s Hospital,” a source close to the Kardashians tells PEOPLE. “North and Penelope celebrated their birthdays at a joint mermaid-themed party this past weekend where all of the party goers had gift bags filled with Nori and Penelope’s favorite toy, My Little Pony.”

These two are the perfect peas in a pod.

North’s love for My Little Pony goes way back. In October of 2015, Kim appeared on the Ellen DeGeneres Show and brought along her daughter as well as a few ponies. While backstage, DeGeneres spent some one-on-one time with Nori, learning the proper way to brush the pony’s colorful hair.

The reality star snapped a photo and shared it online of the comedian and North with the caption: “Who saw @TheEllenShow today? Well this is right before I went on Northie & Ellen brushing My Little Pony s hair lol.”

Keeping Up with the Kardashians airs Sundays (9 p.m. ET) on E!