Bianca Alfaro didn’t need much prodding before she tried the obstacle course set up at Napa Valley College’s track Saturday.

As her mother, Michelle Sanchez, watched, her 4 year-old daughter took less than a minute to jump and hopscotch the course at Napa Active 20-30’s first free Summer Fun Fest.

Nearby, boys and girls climbed a rock wall, built log cabins and checked out the fake snow at a hands-on booth, blew giant soap bubbles, lined up to get their faces painted or watched — with parents in tow — dance, gymnastics and martial arts demonstrations while seated on bales of haystacks.

Tennis players hit volleys with would-be players as young as 2-year-old Eduardo Martinez while Home Depot employees helped kids plant flowers.

Sanchez and other parents said they were glad they found out about the event. They’re always looking for kids activities in Napa, they said.

“I think Napa lacks a lot of kids’ activities,” Sanchez said.

Another mom, Cherice Vanderbilt, who came with her husband, Gray, and their two children, Emily, 3, and Andrew, 4, said she and her family enjoyed the event.

“It’s really nice they would put something together for the children ... keep them occupied.”

Later kids participated in a gunny sack contest, balloon fights and egg races during which a dozen kids ran across the field carrying an egg on a spoon.

Employees at the Hub, a Napa bike shop, built a skateboarding and bike acrobatics ramp for the event.

Napa Saints Football, a youth football and cheer organization, was among the two-dozen nonprofit organizations and community events that had a booth at the event.

“It seems like a neat little event,” said John Torres, the recreational football team’s new coach.

Parents said their kids were having fun.

“They’re having a great time,” said Carri Mello of her two daughters, Gracie, 8, and Tessa, 6, after watching a dozen boys and girls demonstrate their martial arts skills.

Napa Active 20-30 Club volunteers estimated about 300 children and adults attended Saturday’s events.

Danielle Gularte, chairwoman of the event, said the volunteers organized activities for all age groups — from pre-school age kids to teens.

“Kids are always complaining there is nothing to do in Napa,” Gularte said.

The event was modeled after a project designed by Leadership Napa, a program that encourages residents to learn and get involved in the community.

The Napa Active 20-30 Club, a longtime civic club in Napa County with about 40 members, plans to organize the same event next year.

“We’re hoping this becomes an annual event,” she said.