Dutch Wonderland.

The Castle is near Goshen (Rte 17)-- maybe 15-20 minutes off of 87 north? Min-Golf, go-karts, climbing wall, arcade games, and the Goshen diner has pretty decent food. It would probably take you 4.5 hrs nonstop/no traffic to get there and then another 2 hrs to Albany so not really halfway. You can also get there by taking 81 north to 84 east so avoiding 95.

http://thecastlefuncenter.com/

Any suggestions in Pennsylvania so we can avoid 95? Or in NY south of Newburgh?
PP, yes, it is only 7 hours, and is easily done all at once; but we want to break it up so the kids are well rested when we get to the family reunion in Albany on Friday.

Why stop half way? Only about 7 hours. Wake up early and just get the drive done.

Great Adventure NJ, West Piont NY, Storm King art sculpture park.

Diggerland in New Jersey, perhaps? Do they like construction stuff?

We are driving to Albany from Rockville and need a good place to stop half way --- any suggestions? We have two children, ages 4 and 6, and are open to options that take an hour to several hours, just as long as they can stretch their legs. Thank you in advance for your help!