Artists of all ages hit the pavement on Saturday, Aug. 25 for the 5th annual Chalk-Full-O-Fun Festival in Onset.

They were joined by 3D artist David Zinn of Ann Arbor, Michigan who has been transforming sidewalks with colorful and creative doodles since 1987.

"The sidewalk isn't a blank canvas," Zinn said during a lecture at Saturday's festival. "It's something that's already started."

With the help of audience members, Zinn demonstrated how to use a phenomenon known as pareidolia to create street art with physical features that are already present.

As Zinn explained it, pareidolia is what happens when a person perceives a familiar pattern where none such pattern actually exists.

"A crack in the sidewalk can look like a mouth or an eye," Zinn explained. "Yesterday, I saw the base of a broken signpost that was just begging to be a moustache."

Almost everything Zinn draws is done freehand using pareidolia. His tools of the trade are Crayola chalk and a box of charcoal sticks.

"You don't need anything fancy," Zinn said. "You just want to help people see what you see."

According to festival organizer Millie Burrows, Zinn is the first feature artist at the festival to come from out of state.

"Each year we're getting bigger and better," Burrows said. "We couldn't be happier."

Burrows said the inspiration for the chalk festival comes from the Lake Worth Street Painting Festival in Florida. Burrows attended the festival for the first time back in 2013 while visiting family.

"I wanted to bring an event like that home," Burrows said. "It took a year's worth of planning with the OBA to get the first one off the ground and it was a complete success."

Onset Bay Association Board President Amanda Cobb was also present at Saturday's festival, handing out registrations and selling prints of Zinn's art.

"Everyone has their own inspirations and ideas," Cobb said. "It's really wonderful to see people come out together and have fun."

In addition to the art near the Lillian Gregerman Band Shell, Zinn also hid five secret drawings around downtown Onset the night before the festival.

"They'll be there until the next time it rains," Zinn said. "So people have some time to find them."