Children's Museum on the first Tuesday of each month is free from 4 p.m. to 8 p.m

This is pretty cool...

Children's Museum of Denver is Free on Tuesdays!

2121 Children's Museum Dr.
The first Tuesday of each month is free from 4 p.m. to 8 p.m. at the Children's Museum of Denver. The museum has 11 interactive Playscapes where children can shoot baskets, climb on an authentic fire engine, build toy railroads and go shopping in a mini-supermarket. This hands-on learning experience is an ideal destination for children ages 3 to 8 years old.