Wrestlemania 31 takes places this Sunday at Levi's Stadium in Santa Clara and is expected to draw a massive crowd to the South Bay.
On Wednesday, the entertainers were aiming to put smiles on children's faces.
"It's scary in here; boring. And this takes a bunch of their time and occupies them and gets their mind off the bad part," said Gina Schenone of Rohnert Park.
The tedium of being in the hospital disappeared the moment the WWE stars walked through the door, bringing smiles to everyone they came in contact with.
"Anything I can do to just come and make them forget about whatever they're dealing with; just come and put a little smile on their face, make them laugh," said WWE Diva Eva Marie.
No one smiled brighter than four-year-old Isiah.
"I seen The Uso's and Sin Cara," said Isiah with wide eyes.
Back in December, Isiah underwent his third open heart surgery. At birth he had half a heart.
"Since he was born, I've seen him go through so much," said Isaih's mother, Erika Oseguera.
But now three months later, you'd never know the battle the little guy's been through, especially since he's on the ride of his life. He's one of the lucky kids at the hospital going to Wrestlemania on Sunday.
On Wednesday, he got a preview when he met some of his favorite WWE superstars.
"These kids are showing strength and they're battling their own personal battles everyday so they're actually the real heroes," said WWE Superstar Jimmy Uso.
"Anything that has to do with kids and giving back and charity to me like that is the most amazing thing you could have me do this 24/7," said WWE Diva Cameron.
The hospital is one of several stops this week for WWE Superstars and Divas who enjoy using their celebrity to make a difference in the community.