It’s the 10th anniversary of Found Magazine, a publication that features old shopping lists, love notes, drawings, mixtapes, receipts, pictures, and written warnings (such as the one above) that are picked up by strangers. To celebrate, Found editor Davy Rothbart — a contributor to “This American Life” and author of a new collection of essays, “My Heart Is an Idiot” — will visit the Brookline Booksmith on Wednesday to share Found things, as well as excerpts from his book. His brother, Peter , will also be there to perform songs based on Found items. Davy told us by phone from Vermont earlier this week that he does his best to share Found notes at these events “with the energy and emotion that they were written with.” (That means he yells sometimes.) He also warned us that his brother’s musical performances range from heartbreaking to hilarious — especially when he covers a mixtape sent to Found that features some teenagers performing on what they call a “booty tape.” “He does it like a folk ballad,’’ Davy said, with a laugh. Davy told us that many contributions made to the magazine over the past decade have come from people in Boston. That’s either because Found is popular here — or because we drop things a lot and people find them. The Rothbart brothers will also appear at Harvard on Thursday night and in Northampton on Saturday. There’s a full schedule on the Found website. In case you’re wondering, the note above was found near a dorm in Cambridge and submitted to Found in 2008.