Hi,
1. Hey buddy! what are you reading?
- a fairy tale - a funny story / a joke - a folk tale - a crime story - a detective story.
- Are these natural?
A couple of very minor comments.
The phrase 'Hey buddy' is not as common as you might think.
Generally speaking, adults, especially men, do not spend a lot of time reading fairy tales, except perhaps to their small children.
Best wishes, Clive