One of the most successful alternative charity events is Secret 7″—the organization has used music and art to raise money for different charities each year since 2011. Seven tracks from seven well-known musicians are pressed 100 times to 7″ vinyl through The Vinyl Factory. Selected musicians for the 2014 Secret 7″ include Massive Attack, Black Sabbath, Lorde, Roxy Music and more. Each is housed in one-off, specially designed artwork from both high-profile artists and those just starting out (anyone can submit to the open call), meaning there will be 700 unique vinyl covers—and the beauty is that both the track and the artwork’s creator remain a “secret” until it’s been purchased. While the price (£45, or roughly $74) is a bit steep for a 7″, you’re not only purchasing two works of art (song and sleeve) but also supporting children affected by armed conflict; all profits this year will go to War Child. On Record Store Day (19 April), one lucky buyer will discover they’ve brought home a one-of-a-kind original from Massive Attack’s Robert Del Naja, who will also be designing a sleeve.