It's fun to look back and see just how much times have changed. Time changes a lot of things, and with technology advancing so quickly, things are changing more and more. It isn't even that long ago that the Internet didn't exist. It's crazy to see the development of the world in a relatively short amount of time. It can also be kind of sad.

Seeing things from childhood that no longer exist can be pretty bittersweet. It's nice to think about the old times but sad to know they will never be the same. Nostalgia is a strange feeling that while personal to everyone is also a universal feeling for groups of people. Certain images will create nostalgic feelings for many people depending on who they are. Reddit's /r/nostalgia is a place of remembrance for times long gone, users share their most beloved memories from the past so everyone can take a moment to reminisce on the good old days. Here are 25 nostalgic images that may have some people feeling a little old today.