Go-karts allow people to experience the thrill of driving without having to hear radio ads for pungent soaps or look at four empty seats that remind them of the time someone stole their family of mannequins. Keep thrills pure with today's Groupon: for $18, you get an indoor fun-center package at Knucklehead's Bowling & Indoor Amusement Park in Lake Delton (a $37.45 value). The package includes the following:

• Unlimited bowling, including shoe rental
• Unlimited admission to rides. All rides have specific height requirements.
Unlimited go-kart races. Go-kart drivers must be at least 54 inches tall and 10 years old to drive solo and at least 60 inches tall and 16 years old to drive with a passenger.

Housed inside a colorful 80,000-square-foot facility, Knucklehead's Bowling & Indoor Amusement Park entertains visitors with a 24-lane bowling alley and a family-friendly roster of rides and go-karts. Kids and adults can lace up a pair of included bowling shoes and hit the lanes, which are flanked with automatic bumpers to keep wayward balls in check. The optional cosmic-bowling experience enlists black lights and a flashing light show to dazzle guests and make pins reminisce about their gigs as roadies for Pink Floyd.

After conquering the 7–10 split, families can meander over to a fleet of exhilarating attractions, such as a roller coaster and a bouncy Jumping Pillow. The spinning Tornado ride allows passengers to prove the existence of centrifugal force, and a 4-D theater ride creates a simulated experience as realistic as a wax statue of a candle. Bumper cars let mini motorists hone their driving skills before burning rubber on a multilevel go-kart track, where paved paths wind around each other under bright-yellow, -red, and -blue walls. Although additional activities are not included with today's Groupon, Knucklehead's also boasts an arcade with more than 100 games and a full snack bar.