Kim Kardashian shared the sweetest video of her kids, Chicago and Psalm, as well as her niece True, celebrating her son Saint’s 5th birthday by singing and jumping on an inflatable trampoline.

Kim Kardashian, 40, took to her Instagram story to share a memorable moment with her family as they took in the joy of her son Saint turning five-years-old on Dec. 5. In the clip, her youngest son Psalm, 1, can be seen playing and jumping on a multi-colored inflatable trampoline with his sister Chicago, 2, before the adorable gal comes up to the camera to sing her older brother “Happy Birthday”. After showing off her song skills, Kim cheered and told her it was “fantastic” before the tot smiled and turned around to continue playing alongside her cousin True, 2, who was also there celebrating.

In addition to her fun videos, Kim reposted several birthday wishes for Saint from friends and family to her Instagram story. She also shared her own special post in honor of her little boy, which can be seen below. The post included three sweet photos of her and Saint hugging and kissing each other while smiling.

“My baby Saint turns 5 today. One of my life’s soul mates,” she wrote in the caption for the post. “Every year I interview my kids and ask them the same exact questions about life. Saint- I can’t wait to see how you’ve grown and how you answers these questions as a 5 year old and show them to you when you’re big. I know a drive- by party isn’t ideal but it’s our times and you are so excited! You are always so joyful and bring so much joy into my soul every single day. You will always be my baby boy. Enjoy your golden bday this year Sainty! #5onthe5th!!!”

Before Kim celebrated Saint for his birthday, she showed off a too-cute-for-words video of him cuddling little Psalm while letting out a laugh on Nov. 16. The swoon worthy moment between the brothers was one that we don’t often get to see so it was definitely a special treat for Kim’s fans, who seem to love seeing snapshots into her life with her kids. There’s nothing quite like brotherly love after all!

Since the holidays are coming up in a few weeks, it’s likely that Kim will continue sharing wonderful moments with her family. The Keeping Up with the Kardashians star is known for going all out on Christmas, especially, so we look forward to seeing how she’ll wow her followers this year!