NYC Parks is running a free tie-dye workshop in the Bronx this week: Canvas of Color lands at Nelson Playground (Nelson Ave. and W. 166th St.) on Thursday, Aug. 6, from 4 to 6 p.m. The deal is simple — show up, and the parks department supplies the dyes and instruction; you bring a new t-shirt or any piece of clothing you want to transform into wearable art. It’s free, open to all ages, and exactly the kind of hands-on summer programming NYC Parks quietly runs at neighborhood playgrounds all season long. Tie-dye is messy by design, so it’s worth wearing something you don’t mind staining and arriving early to claim a spot at the table. If you’ve never done it — or haven’t since summer camp — this is a low-commitment, zero-cost way to spend a Thursday afternoon, and you walk away with something you actually made. The workshop is part of the parks department’s Canvas of Color series of free craft events across the city.