I go to Columbus, OH every so often (I'm spending more time in Ohio than in Pennsylvania, ugh) and a few places I go to kill time

Garden Ridge & Dave & Buster's -- Across the way from each other on I-270 on the west side of town. My wife looks at craft stuff at Garden Ridge, I play games at D&B.

Easton Town Center -- A good mall to kill some time. Some nice restaurants.

Longaberger -- An hour east in Newark, OH ... A massive store with all sorts of stuff. Longaberger makes baskets. Another chick thing, I guess. The store is impressive though. Near Longaberger is Dresden, OH with lotsa craft places.

If you don't want a car, then I guess you can kill the time downtown. There's a mall there. That's all I saw, and then I left. Cars are pretty cheap so unless you really don't want to drive I'd say get one. The Pricleine hotels I usually try for are Dublin 3* (Wyndham or Marriott) and OSU 3* (Sheraton Suites).

PS: I spent six hours at the Dayton Air Force museum and still didn't finish. But I am fascinated by these things. My wife was done in 3 hours