Ted Williams frequently claimed hitting a baseball was the hardest thing to do in sports, but that was when pitchers were equipped with pneumatic pitching cannons and hitters had to swing blindfolded with one hand tied to their ankle. Practice with modern athletic parity with today's Groupon: for $40, you get an unlimited family batting cage pass at Balls-n-Strikes. This deal is valid until November 30, 2010, and passes are valid at the Ballwin, O'Fallon, Westport, and Fenton locations. Family members can practice their swing and work on their hand-eye coordination to their heart's content, then force-feed surplus joy into their tickers with more unlimited at-bats. Passes are used on a walk-in basis and are subject to cage availability, though you may use your Groupon at any location at any time, not simply at the location that activated it.