NYC and Children
American Museum of Natural History
Centtral Park Zoo
Children's Museum of Manhattan
New York Aquarium
New York Botanical Garden
Rose Center for Earth and Space
Sony Wonder Technology Lab
South Street Seaport Museum
These are just a few places. There are other places you can take your kids to that isn't really that expensive.
If anyone has any ideas of where kids can hang out and have a good time, post it here.