Before skateboards, the coolest mode of sidewalk transportation was piggybacking an astronaut. Explore terrestrial asphalt with today's Groupon: for $25, you get $50 worth of skateboards, shoes, hardware, and accessories at Milton Skateboards in Milton.

Milton Skateboards, founded in 2010 by high-school senior Michael Hough, rolls out skateboard decks, bearings, apparel, and other skating accouterments. Wheels whir with the help of Bones Reds bearings ($14.95) beneath blank ($24.95) and decorated ($39.95+) pro decks in a spectrum of designs including skulls, elephants, abstract patterns, and Norman Rockwell vignettes. Lakai Manchester Select shoes hug feet and latch onto boards with their tacky gum-rubber outsoles and shock-absorbing insoles ($52.95). Skate T-shirts ($18.95) and Zoo York board shorts ($44.95) shield bodies from sunburn and asphaltburn, and Pro-Tec skate helmets ($29.95) protect heads from nasty spills and falling sky. Milton Skateboards extends a 15% discount to military servicepeople.