(CNN)Hayley Orlinsky wanted to raise $200 for Chicago's Ann and Robert H. Lurie Children's hospital by making colorful rubber band bracelets.
A few months and more than 8,000 bracelets later, Hayley, 7, has raised more than $20,000, helping the hospital purchase personal protective equipment (PPE) and support research efforts.
The Chicago second grader began the project with an apparent knack for entrepreneurship -- she sold the most cookies in her Girl Scout troop last year -- and a desire to spread kindness in response to bullies who made fun of her height.
"When I was 3 years old, I got bullied for being the shortest kid in the class, and my mom wrote a book about it, and it was my moment I knew I wanted to spread kindness everywhere," Hayley said.
When asked whether she understands what a significant financial contribution she's made to her hometown hospital, she smiled.
"It's definitely more than the tooth fairy gives!" she said.
Hayley's mom, author Lori Orlinsky, says what started as an after-school hobby quickly became a sensation.
Hayley has now sold bracelets to customers as far as Italy, as well as to Chicago Mayor Lori Lightfoot, the Chicago White Sox and Miguel Cervantes, who played the lead role in Chicago's production of "Hamilton."
Shortly after Lightfoot posted about the bracelets, the Chicago flag colors became Hayley's most in-demand bracelet design.
Hayley's bracelet making has become a community effort. She says she's gotten her friends involved, teaching bracelet making at her summer camp, and later to friends over Facetime and Zoom.
"Every day the campers had the choice to help Hayley make bracelets, and she would come home with hundreds. It was really helpful to us," said Lori Orlinsky.
Added Hayley: "Yeah, because that's when we were really in a tight squeeze."
Hayley chose to donate to the Lurie Children's hospital, having spent time in their intensive care unit at birth. She wanted to give back after hearing that health care workers were running low on PPE.
"$20,000 is a pretty incredible amount to raise, especially for a 7-year-old," said Tracey McCusker, an associate director for the hospital's foundation. "This kind of fundraising effort allows the hospital to use the money for a variety of different things. It was definitely needed at a time, when we really needed to respond rapidly to Covid-19."