. >> so my name is jeffrey reppucci. >> reporter: the sound of silence is not music to jeff reppucci's ears. >> today we will build seven playgrounds, create five new schoolyard basketball courts. give me a little noise here, people. >> reporter: but this is. a graduating senior at the college of the holy cross in worcester, massachusetts, reppucci's got people swinging hammers, pouring concrete, raking, and the down and dirty truth? it means as much as the degree he's earning. >> it's truly made me fall in love with this place. and it's completely changed my life. it's changed numerous students' involved in this project's lives. >> reporter: after spending a summer in a small russian village three years ago, reppucci returned with a mission. working for worcester, part of his new non-profit was born. about 700 fellow college students from ten schools joined him in an effort 1,100 strong this year including corporate volunteers for an annual day of community service. >> i think it's awesome that they're cleaning up the park, adding more things for the kids to do, a better place for the