The Museum of Nature and Science has a pair of early-bird opportunities for all ages. Between 9:30 and 10 a.m. July  20 and 27, visit the Science Building box office to get $5 tickets to the 10 a.m. IMAX film. At 4 p.m. July 21 and 28 $5 exhibits and IMAX tickets (4:30 p.m. film) are available. See nature and science.org/information about restrictions and more information. The Science Building, 1318 S. Second Ave. in Fair Park.