What was cool when you were young but isn’t cool now?

I think mp3 players were cool when I was young but they aren’t cool now. As IT technology has improved rapidly, many things come out and are changed. One of the most noticeable things is smart phone. We can do everything through this small device that can be held in one hand. We can explore the internet, listen to the music, read a book, and so on. I used to hold my mp3 player and phone together, now I don’t have to.