If you are travelling to pennsylvania you ahve got to take in the Hershey Factory as a must see. along with shopping for outstanding chocolate and learning how they make it. There is also a theme park and it is real cool to see!
Also, If you have time and a little extra cash - soak in a tub of hot chocolate at the Hersehy spa.
Sooo, don't skip Chocolate World... they give out free candy in the end!