This listing is for vintage slides from generations of a family. You see the kids grow up and then you see the grown up kids with their own kids. The family enjoyed vacations and traveled in a van. They visited national parks, family, farms, tourist locations, etc. In the 1950s, they went to Europe. Some of the slides of notations on them, such as location, year, and subject. The slides date from the 1940s through the 1970s.
In the Large flat rate box, there are 2 levels of 6 rows of slides. Each row is approximately 240 slides. The top layer has 36 stacks of ~30 slides. 240x2x6 + 30x36 = 3960.