I don't know about people in general but I could list things to do that are fun all day long for a very long time. On my phone, gaming is certainly one thing where there are tons of games you can play. Some people like social media. I like to read the news of the day and follow stocks occasionally. I also keep movies and music on my phone where I listen to music while at the gym or cutting the grass and watch movies if I am flying somewhere or sometimes away from home. On the home pc, you can setup your own production house for making videos to upload to sites like YouTube or just make home movies. Then there are the tons of useful apps on the phone where I can get the weather, use it as a gps, get traffic conditions, I have booked and paid for airfare and used my phone as the ticket, even for concerts. Then there is online banking, you simply use your phone to snap a picture of your checks you want to deposit, no more trips to the bank. I got side tracked, you did say for fun. Of course fun is subjective, I like using the internet to learn more about the hobbies I enjoy, like woodworking and programming. It is also nice to always have a camera on you for taking pictures or videos when the moment arises.