You can see snapshots of what people look like as they age and even make composite faces, and the photos are beautiful. The book also comes in traditional print format, but you can get it digitally gratis. It's a thought-provoking look at the diversity of human aging and well worth a tiny bit of memory on your iPad.
If you have an iPad, the 0 to 100 Project is a gorgeous free download.
If you have an iPad, the 0 to 100 Project is a gorgeous free download. The app is actually an art book, with images by photographer Sandy Nicholson documenting "the true face of the human lifespan: 101 portraits of folks at every age, from mere weeks to a full century old."