If you're going to be in the Jericho, NY area soon, you'll thoroughly enjoy your time there, since you and your family won't run out of fun things to do and see.
The NYCB Theater at Westbury is a great place to see a performance or concert, and Old Westbury Gardens is nearby as well, so you can see the beauty of local nature before heading to the theater. Planting Fields Arboretum State Historic Park is another outdoor location in the area that has stunning plant life and lots of walking space.
Bounce Trampoline Sports is fun for the whole family and takes indoor sports to another level. You can also visit Can You Escape LI for intense escape games that test your critical thinking. Cradle of Aviation Museum is another attraction you won't want to pass up while you're in town, especially if you want to learn more about the history of aircraft.
Before heading home, check out Jericho Cider Mill for unique gifts you can take to your family and friends.