New Jersey State Fair
Typical State Fair with exhibits, shows and food in a very large fairgrounds facilities for about 10 days every summer. Check website for exact dates, which change every year. Other events throughout the year, as well.
Land of Make Believe
Amusement Park "Specifically Designed for Parent Participation with Children"
Waterloo Village
Former historic park where actors demonstrated activities from colonial and revolutionary American times. Later, a popular concert spot. Now closed only for special occasions, like the Dodge Poetry Festival (http://www.dodgepoetry.og), the future is uncertain for the Waterloo Village. Historic preservation is underway, see attached link for official word from the NJDEP.
Minor League Baseball at Skylands Park
Home of the Sussex Skyhawks, formerly New Jersey Cardinals, now part of the CanAm League. (http://www.canamleague.com/)
Mountain Creek Resort
Mountain Creek is famous for its skiing in the winter time and it's "water park" in the summertime. Basically, a big theme park. Definitely fun stuff. The bike park is new since I've been there and they have other events in the fall: Wine Tasting, Dog and Horse Shows, Farmers Market. Lots more. It's all on their web site above.