Art is hard, especially when fortified by the flames of a sintering kiln. Get a piece of sturdy, ceramic eye candy with today's Groupon: for $25, you get $50 worth of pottery at Rowe Pottery Works in Cambridge. Founded in 1975, family-owned Rowe Pottery Works replicates popular historical pottery styles using a salt-glaze firing process and a hand-thrown decorating method. Get a cerulean blue sandstone pitcher ($65.50) to serve punch to your pet giraffe, or choose a spring vase ($32.95) to spruce up drab, white metal space voyager cockpits. Customers can shop online or peruse pottery in person at Rowe Pottery Works retail location.