NEWBURYPORT — Two local high school students and two senior community members were honored for their volunteer efforts at the annual Generations of Giving ceremony Wednesday.   About 25 people, some of whom were former Generations of Giving honorees, gathered at the Senior Community Center for the ceremony, which is held during each year’s Yankee Homecoming celebration and recognizes local residents young and old who have made a difference by donating their time and energy.   This year’s senior volunteer winners were Bob Peters and Don Beaulieu, who were honored alongside youth winners Kylie Lorenzo and Anna Cameron.   Peters, 85, has spent a decade packing and delivering meals each weekday for the area’s hungry residents as part of Newburyport’s Meals on Wheels program. On the weekends, Peters and his friends also help feed the area’s hungry residents, house its homeless and perform minor repairs for people in need.   During the ceremony, Peters shared some wise words from his grandmother, who encouraged him to help those around him from a young age.   “I can remember my grandmother saying to me when I was so young, I could barely walk. She said, ‘If you can do something for somebody, do it and don’t even think about it, and it comes back to you a hundredfold,’” Peters said.   Beaulieu served as a Salisbury selectman for three terms, and volunteered on the Warrant Advisory Committee and the Triton School District Subcommittee. He volunteered to record Salisbury town committee meetings and also works for Northern Essex Elder Transport, taking local seniors to medical appointments in Boston.   Cameron, a Newburyport High School junior, has volunteered at the city’s Recycling Center for several years and runs the “Free Corner,” which keeps usable items out of the city’s waste stream and gives them to new owners. She manages the TerraCycle collections and has helped with Toward Zero Waste Newburyport projects, including volunteering at the Repair Cafe.   Cameron was unable to attend the ceremony, but her mother, Susanne Cameron, spoke on her behalf. She praised her daughter’s dedication to volunteering and informed guests that Anna planned to donate her cash prize to charity.   “She is a tenacious volunteer,” Susanne Cameron said. “When most kids her age are sleeping on Saturday morning, she is at the Recycling Center in the snow, rain, cold and heat. ... She really believes in the spirit of volunteerism.”   Lorenzo, a senior at Triton Regional High School, has logged 120 volunteer hours at Anna Jaques Hospital’s patient information desk and in the patient transport department over the last three summers.   Lorenzo is a member of the Triton Community Service Club, through which she has volunteered for PTA meetings, the Salvation Army, elementary school events, road races and other events. When Lorenzo returns to school in the fall, she will be vice president of the student council.   At the ceremony, Lorenzo thanked her family, who she said “always encouraged me to give back.”   Richie Eaton, a former chair of Yankee Homecoming, also addressed the crowd Wednesday, shining a light on the volunteer spirit that he said drives Yankee Homecoming.   “Without the volunteers, you wouldn’t have Yankee Homecoming,” Eaton said. “Without volunteers, we’d be nothing. It’s so important to all of us.”   Staff writer Jack Shea can be reached via email at jshea@newburyportnews.com or by phone at 978-961-3154. Follow him on Twitter @iamjackshea.