Hundreds of pediatric cancer patients got a chance to celebrate Halloween early Saturday as part of the 29th annual Boo Bash put on by the American Cancer Society.

8-year-old Sergio Barrera was diagnosed with leukemia this past January. Since then, his life has been full of doctors appointments and treatments.

"He's very aware of what's going on. He's accepted it, and he's going through it very well," said Christina Barrera, his mother.

Some of the adults at this year's Boo Bash are pediatric cancer survivors, too.

"It's a humbling experience. These kids are such heroes, and I'm reminded every year. It kind of grounds you that you think you might have problems in life, but you come and see these kids. They're such true heroes. It just inspires you," said Delores Hagen, lead volunteer with the American Cancer Society.

For the Barrera family, it's a chance for Sergio to just be a kid.

"We've had our ups and downs, but we're still here. That's all that counts. [It makes] him feel a little bit more like himself," said Barrera.