What do you want to know? Things to do weekends Hershey Park or Dutch Wonderland (don't think they will be open during the week because of schools). Tours of Lancaster, Amish, and the Strasburg Train to name a few things.
Dutch wonderland is awesome. I went there a few times with the family I used to be a nanny for. It probably wouldn't be much fun for older kids, as far as I remember. The kids I looked after were 3 & 5.
I have never been there for longer than a day-trip.
If you are thinking about spending a lot of time at the park...be aware that they are not open full-time until the end of May. We are taking all of our kids there for a day-trip when we are in the states for Dd#1's college graduation in May....and we have to go on a Sunday because they are not open most of the week yet.