The second law of thermodynamics states that everything in the universe tends toward smallness, a principle that can be reproduced in a lab by pouring water over a piece of granite for several hundred years until you notice the shrinkage. Enjoy some bite-size fun before it completely fades away with today’s Groupon: for $12, you get either four go-kart rides or four rounds of miniature golf (up to a $26 value) at Go USA Fun Park in Murfreesboro, about 40 minutes from downtown Nashville.

Go USA Fun Park offers families and friends a variety of fun outdoor entertainment. Guests can practice their putting and get small amounts of exercise as they follow winding greens through the park’s 18 holes (up to $5 per round) of diminutive golf, admiring the scenic views of a wee castle, a quaint mill complete with charming water wheel, and a pool filled with crystal-clear water that severely limits the leviathan’s element of surprise. Or, if driving small vehicles fits your idea of non-large regalement, try four laps around Go USA’s go-kart track ($6.50 per ride), which is nearly a quarter of a mile long and snakes between lines of tires that save wayward kartists from unwanted offroading during high-speed Bond-esque kart chases. The park has 20 karts to offer drivers, including both double-seaters for reckless newlyweds and single-driver racers with elevated rear spoilers and hitches for Airstreams.

Though not available with this deal, Go USA Fun Park also features a collection of arcade games, a driving range, and batting cages where visitors can trade their firstborn for a chance to face the ghost of Cy Young. Venture into new realms of miniature family-size merrymaking with today’s deal.