Watch Mac DeMarco, Matt Martians, & Steve Lacy Jam With Kids For UNIF

Mac DeMarco is everywhere this week: in Charli XCX's "Boys" video, on @Midnight, and apparently joining some children in a jam session with the Internet's Steve Lacy and Matt Martians. Clothing company UNIF apparently has some kind of summer kids' program, and based on Instagram evidence it seems DeMarco, Lacy, and Martians participated by playing…