What are some activities to do in NJ?

I recently went indoor rock climbing and it was SOOO fun! I'm looking for other fun stuff to do. Got any ideas? And where I could go? I'll even go to NY. I went rock climbing in Brooklyn, NY. In 2 or 3 weeks I'll be checking out other spots in NJ. I plan to lose some weight and strengthen my forearms and hands. I was able to climb but I want to climb more challenging obstacles next time