Looking for something to do in Teaneck, NJ during Chol Hamoed? Why not try World of Wings. My son has been there before and he loves it. They have tons of Butterflies.
There is a Groupon available for World of Wings. 2 Admissions are $18. Normal price is $18 for an adult and $11 for a child over 2.
Don't have a Groupon account? Sign up here for free
If you have a Discover Card you can start your purchase from Shop Discover and get 10% cashback.
If you don't, you can start your shopping from Ebates and you'll get an additional 8% cashback into your account.
Always remember to check out Cash Back Monitor to see your best options for online shopping portals. They are lots of good options for extra miles from shopping portal (like chase, american airlines and united) so if you don't want to do either of the ones I mentioned, make sure to check it out.