On September 30, 2006, for one day only, museums across the country will join the Smithsonian Institution in its long-standing tradition of offering free admission to visitors.

What's Museum Day
http://www.smithsonianmag.com/museumday/articles/what-is.php

Check out participating museums
http://www.smithsonianmag.com/museumday/articles/venues.php

Here are the participating NM museums:

Millicent Rogers Museum
Taos


National Hispanic Cultural Center Art Museum
Albuquerque


The Hubbard Museum of the American West
Ruidoso Downs

Let's turn this into a field trip, whaddya say?!