IRVINE, Calif. — September is Childhood Cancer Awareness Month.

The American Cancer Society says about 9,910 kids under 15 years old will be diagnosed with cancer this year in the United States.

The Jessie Rees Foundation in Orange County has delivered special jars full of joy to over 450,000 kids fighting cancer in the U.S. and worldwide.

Jessica Joy Rees, better known as “Jessie,” started JoyJars during her battle with cancer. 

The 12-year-old would see kids in the hospital who couldn’t leave and wanted to do something to help them. She asked her parents if they could bring toys and other goodies to the kids.

In 2011, they started stuffing jars full of baseballs, toys and other items kids like. 

Each jar is customized to the kid receiving it. Rees lost her battle against cancer on Jan. 5, 2012. 

But her family has carried on Rees’ desire to help by continuing the JoyJars and doing many other things for kids fighting cancer and their families.