Simplify the following text for a Grade 5 native English-speaking person.
Original: They visit the same stopping places that Christian visited , with the addition of Gaius ' Inn between the Valley of the Shadow of Death and Vanity Fair ; but they take a longer time in order to accommodate marriage and childbirth for the four sons and their wives .
Simplified: They visit the same places that Christian visited , but they take a longer time . This is because the story includes the marriage of his sons , and children for the four sons and their wives .