Boston

10am, Sat; At Riverfront Park: 40 Commercial St, at Boulder; Fitchburg; 978.345.9602

Melt your mind watching these practitioners of the lost metal arts pound scalding hot metal into letter openers, candle sticks, and other brawny stuff. Artists and handcrafters will also peddle their wares while you kick back to live music, seasonal foods, and a giant pumpkin carving contest, which you'd be a fool to enter, unless you want to hear "small tool" jokes all day.

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