Reading, writing, writing music, listening to music. Unfortunately most these you need a computer to be able to do for small cost via programs off the internet but you find most of these things on the Internet for either free or less than 10$, like music editing software you can get cheap versions or free versions for basic editing or if you really like to make your own stuff you can buy a good program to make something really cool. But other than that most other things on the Internet are free.