Susan Lowell reads from her book The Great Grand Canyon Time Train at 2 p.m., Sunday, Aug. 5; free with admission. Hours are 9 a.m. to 4 p.m., Tuesday through Saturday; and noon to 4 p.m., Sunday; $9, $8 senior or military, $6 age 4 to 17, $6 adults on Thursday, free younger child. Visit theminitimemachine.org for more information.