The town is inviting residents to take part in its annual Norton Founder’s Day Picnic and Fireworks Saturday from 5 to 9 p.m. at the Henri A. Yelle School field, 64 West Main St. Now in its third year, the free communitywide celebration is presented by the Parks and Recreation Department through the efforts of an all-volunteer planning committee. It was begun as an annual event after a picnic held as part of the town’s tricentennial celebrations in 2011 drew a positive response. Last year, 3,200 people attended. In addition to the fireworks display, which will begin at about 9:10 p.m., this year’s event will feature bands, a DJ, pony rides, Kiddie train rides, a blueberry pie-eating contest, antique cars, Fire Department demonstrations, a petting zoo, an antique car display, children’s races, and a community sing-a-long. There will also be food vendors. Families are welcome to bring blankets, chairs, and coolers. For more information, go to the Parks and Recreation Department’s website, www.nortonparksandrec.com.