Free Kids Stuff:

The Children's Museum of Manhattan (83rd b/w Broadway and Amsterdam) has a program where admission for adults and children (all ages) is free on the first Friday of every month. We took the pumpkin last month and she had a blast. As it gets busy fast, we recommend getting there as close to 5 as you can, especially if your little one is under two.

Target First Free Friday! (Next as of this writing: Friday, September 4, 2009)
Children's Museum of Manhattan
(212) 721-1234
Admission is free from 5—8pm

Extra bonus? During August's event, there was a Time-Warner ice-cream truck outside (that isn't a typo) selling cups and cones of soft-serve for a buck!*

* More info on that TW ice-cream truck: One hundred percent of the proceeds will be donated to nonprofit organizations that offer science, technology, engineering and math programs for kids. Cool, huh?