A really good way to kill time is to go to the children's section of any bookstore and start reading books. You can accomplish a variety of things this way.
Firstly, you can learn new words and increase your vocabulary. Because children's books are aimed at children, the meanings of words can be easily discerned based on the context and images in the book.
Secondly, most children's books are short and yet many are story-driven with relatively simple plots. This makes children's books easy to understand while at the same time offering a very fast form of entertainment. In the amount of time it would take to read an adult novel, you could probably read over a dozen children's books. Imagine, that's twelve times the number of stories that are usually contained in a novel!
Thirdly, for parents, reading children's books in the children's section allows you to pre-screen books for your children. By reading the book first you gain an understanding of the material and can also select titles that are worthwhile.
Lastly, it's easy to miss simple life lessons as you grow up. A good way to learn about important themes like friendship, teamwork, or honesty is by reading children's books. Almost all children's books focus on some theme or moral making them invaluable as teaching tools.
So next time you have a few minutes to spare, head on over to the children's section of the bookstore where entertainment and learning abound.