Denver Rocks! Let's do cool things!
Yay science! And yay free admission!
The Scientific & Cultural Facilities District is a voter-approved special district in the seven-county metro area that provides a stable source of supplemental funding to more than 300 scientific and cultural organizations inside the district’s boundaries. The SCFD collects a one-tenth of 1 percent sales-and-use tax (or one penny on every $10 spent), providing approximately $40 million each year to area cultural attractions both small and large.
A fee still applies to IMAX films, Planetarium shows, and temporary exhibitions. Reservations and amenities (lunchroom, coat and lunch storage, bus drop off, etc.) for school groups are not available on SCFD Community Free Days.
[Free]
More info: http://www.dmns.org/about-us/scfd-free-days/