All school children have experience of this change in their living routines. I think children are interested in other children's lives and experiences when not in school. I also think the topic encourages question asking and empathy with alternative points of view and a valuing of diversity as well as offering reassurance about common experiences. Many people do many of the same things. Not everyone does the same things.
Some people do very unusual things.
Unusual things for some children are common experiences for others 5. You can't always do what you want to, even if it is vacation 7. One advantage of a project on a real life topic is that everyone has something to contribute. By the way, during the vacation many children have a few household chores to do. Some may not.