Many things have changed over time. As adults, we notice that a lot more. We start thinking about what changes have occurred and what changed. We also think about how it made our life much better in most cases. 
I love to teach my students about what life was like then and now. We compare many different kinds of topics. Some of the topics are transportation, technology, school, children, homes, etc. After viewing different kinds of photographs as well as reading many different kinds of books, we create our bulletin boards. I love to see what the students gather from my teaching. I have the students write what was different then and what we have today.  For example, we look at what students used then in school like slates and what we use today iPads.  I love to see my students faces and notice how things have changed through time.  I am always thinking of ways to showcase their learning and that way is through bulletin boards. 
I created a few products on Teachers Pay Teachers that I use in my classroom as a way of showcasing the learning that happens. I also use that as an assessment of what my students learned.  I have a few products for this topic. I created separate activities and a bundle. I will link them here for you.
Bundle- https://www.teacherspayteachers.com/Product/Then-and-Now-Bundle-9325894
Leisure and Chore- https://www.teacherspayteachers.com/Product/Leisure-and-Chore-10326353
School Then and Now- https://www.teacherspayteachers.com/Product/School-Then-and-Now-9233286
Transportation Then and Now- https://www.teacherspayteachers.com/Product/Transportation-Then-and-Now-9233265
Technology Then and Now- https://www.teacherspayteachers.com/Product/Technology-Then-and-Now-9233257
Toys Then and Now- https://www.teacherspayteachers.com/Product/Toys-Then-and-Now-9233296
Happy Teaching!