Caitlyn Jenner congratulates her daughter Kylie on Stormi's birthday with her friend Sophia Hutchins

She spent the night of Saturday preparing for the Grammy Awards at the Clive Davis party.

But Caitlyn Jenner put the family first as she celebrated the first birthday of her grandson Stormi at a lavish party hosted by Kylie on Saturday afternoon.

Sophia Hutchins, a 22-year-old girl, joined the 69-year-old reality TV star as she shared videos of the couple chatting about children's rides with her Instagram followers.

Grandparent: Caitlyn Jenner put the family first as she celebrated the first birthday of her grandson Stormi at a lavish party hosted by Kylie on Saturday afternoon.

Caitlyn, married to Kris Jenner for 24 years, has congratulated her youngest daughter, Kylie, in the legend.

She wrote: "Beyond my amazing daughter's pride for all her accomplishments, but above all her incredible mother for her little girl! And what a beautiful birthday party !! Happy first birthday, Stormi!

We hear Caitlyn on the video calling Sophia's name for her attention, while the chuckling couple experiment with children's walks at the carnival-themed party.

The 69-year-old reality TV star, she shared videos of children's rides with her Instagram followers

She also tried to film herself in a selfie, capturing mainly the top of her head.

The former Olympian was dressed in a black top and a leather jacket with slim blue jeans.

She completed her outfit with casual gray sneakers, which seemed to match those of Sophia.

Have fun: she was joined by girlfriend Sophia Hutchins, 22 years old

She also tried to film herself in a selfie, capturing mainly the top of her head.

Close: Caitlyn is heard on the video calling Sophia's name for her attention.

High jinx: the chuckling couple tried the kiddie rides at the carnival-themed party

Slides: The pair also tried the multicolored slide.

Laughs! Sophia was in a leather jacket with straight blond hair

So much money! They presented the many rides and animations during this sumptuous event

Dolled up: Caitlyn inverted the camera to present her makeup

Ride a horse: the couple seemed to enjoy the company's one from the other

Guest: Caitlyn shared images of the sumptuous party

The poses on either side of Kylie and Stormi – who wore an adorable sequined blouse.

They did not seem to have any contact with Kris Jenner who participated in the same rides, but at different times, alongside her grandchildren.

Sharing a video en route to the party, the author of Secrets Of My Life said: "Hello. heading towards the first anniversary of Stormi. How does time go? It seems that just a minute ago, I was celebrating Kylie's first birthday. And then start for the Grammy pre-party. Should be fun. & # 39;

The party began on a surreal note, inviting guests into the mouth of an inflatable and terrifying baby's head that resembled the crackling image of Stormi herself.

Sofia Richie – the girlfriend of Kourtney's ex-friend / family member, Scott Disick – shared amazing pictures of giraffes and zebras walking in the evening.

Cha Ching! The party began on a surreal note, inviting guests into the mouth of an inflating, terrifying baby's head that resembled the spitting image of Stormi herself.

Point of View: Take a ride with her daughter Penelope and her mother Kris, Kourtney shared a first-person view of the carnival ride.