Spirit Halloween hosted a Halloween party on Wednesday for Sparrow's youngest patients.
The event, which provides costumes, crafts and good bags to attendees, is part of the company's "Spirit of Children" program.
The program focuses on making hospitals less scary for kids and their families.
We attended the Halloween party to get to know the kids and learn more about the event:
Spirit of Children has raised more than $160,000 for Sparrow to date.