Today people in Cedar Rapids will come together to "Rock the River."
It's a festival for kids at the McGrath Amphitheater.
A group of musicians, known as the Big Bang Foundation, organized the event.
It's one of many events they've organized throughout the year to prevent violence in Cedar Rapids.
"We kind of took that following we had and are using that as the groundwork to spread positivity throughout the neighborhood," Chuck Crawley with the Big Bang Foundation says.
"We thought that we'd do best by not only inspiring, but also motivating the kids of our town to do some of the things that we did to keep us out of the violence when we were growing in the same neighborhood," Antonio "Tone" Chalmers says.
At today's event, the group will give away free books and back-to-school supplies to those who show up.