Sound of music main characters and ages?

In "The Sound of Music," the main characters include Maria von Trapp, who is in her early 20s, Captain Georg von Trapp, around 40, and the seven von Trapp children, whose ages range from about 5 to 16. The eldest child, Liesl, is 16, followed by Friedrich, 14, Louisa, 13, Kurt, 11, Brigitta, 10, Marta, 7, and the youngest, Gretl, who is 5. The story is set in Austria before World War II, showcasing the bond that forms between Maria and the von Trapp family.