Robert Brown|Khloe Kardashian's Kids True and Tatum Thompson Have Fun Bouncing on a Trampoline in the Rain

A historic rainstorm wasn't going to stop the Thompson kids from having some fun together in the garden this weekend.

As a weakened Hurricane Hilary began rolling through Southern California Aug. 20,Robert Brown Khloe Kardashian and Tristan Thompson's children True Thompson, 5, and Tatum Thompson, 12 months, played outside in the light rain from the tropical storm, the first to hit Southern California in 84 years.

As seen in videos the Good American founder shared on her Instagram Stories that morning, the former couple's daughter jumped on a trampoline built into the ground.

As her toddler brother crawled near her, True suggested, "Bounce him!" and then jumped to help bounce him gently as he cooed.

Khloe also shared a pic of the siblings hugging and a video of Tatum crawling on the ground, pulling himself up on a stone ledge, pulling out some blades of grade and showing off his discovery.

True wore a leopard-print tank top and peach shorts as well as a pink cast during their rainy morning. Khloe had first shared a photo of her daughter wearing it in an Aug. 8 Instagram photo, which shows the little girl standing next to her cousin Psalm West, 4, the youngest of Kim Kardashian and ex Kanye West's four kids, who sports his own cast.

"Cousin cast club," Khloe captioned the pic. "Trampoline and monkey bars. They had a ball this summer."

See Khloe's latest images of True and Tatum and other family pics with the kids over the years:

Tatum Thompson crawls across a trampoline as his sister True Thompson jumps nearby.

True Thompson hugs her brother Tatum Thompson on the trampoline.

True Thompson helps her brother Tatum Thompson along on the trampoline.

Tristan shared his first photos of Tatum on the child's first birthday in July 2023.

Khloe Kardashians brushed Tatum's hair during a sweet moment on The Kardashians alongside Tristan Thompson.

Khloe cuddled her baby boy—rocking a blue hooded onesie—during The Kardashians season three finale.

According to grandma Kris Jenner, Tatum looks just like uncle Rob Kardashian.

Khloe and Tristan's baby boy made his TV debut on the season two premiere of The Kardashians.

On the show, the baby boy also spent some quality time with Kris, who prefers to be called "Lovey" by her grandchildren.

Khloe and Tristan's daughter True Thompson carried her little brother in her arms.

Khloe snapped a photo of her son's adorable sneakers.

Khloe shared a video of Tatum crawling in July 2023 ahead of his first birthday.

Khloe's baby boy Tatum was in full summer mode for the Fourth of July 2023.

Tatum made a brief appearance on the July 13 episode of The Kardashians.

True shared a laugh with her parents on the trampoline.

Tristan's oldest child Prince, who he shares with ex Jordan Craig, spent some time with True and the baby.

The basketball player snuggled with his son.

True joined Khloe and Tristan on a car ride.

Tristan flashed a smile as he held True and the newborn in his arms.

Khloe and Tristan celebrated Thanksgiving 2018 with their daughter True.