The small indoor area that can be accessed through its own gift shop (plush Barney, $17), is technically the postshow area for a singalong show. The doors close at the start and stay closed until the ordeal is over. Frankly, being locked in a room with that sappy purple dinosaur and all those screaming babies constitutes a chamber of horrors for me, but little ones find it enthralling. Parents can find Duff Beer in Springfield nearby, if that helps. The play area mimics Barney’s backyard with a waist-high counter for sifting through sand (so it won’t get into shoes), a tree equipped with little slides, and a chance to have your picture taken with (and then buy it from) Barney the Capitalist Dinosaur.