University of Colorado Museum of Natural History at Boulder (always free)
The University of Colorado Museum of Natural History is a free natural history museum on the CU Boulder campus. They have excellent changing exhibits, a dinosaur section, and an extensive bird display.
Location:
The Henderson Building on the CU-Boulder campus, between 15th and 16th streets east of Broadway. Map
For details check their web site: 
Free Trips Random Panorama
Upcoming Colorado Free Days
-
Sat 02-04-12:
Art Museum -
Sun 02-05-12:
Doll & Toy Museum -
Sun 02-05-12:
Denver Zoo -
Mon 02-06-12:
Denver Zoo
