In my opinion, reading books is the best leisure activity for teenagers. Firstly, we can learn lots of new things and expand our knowlegde. Books also give us much interesting information. Secondly, reading books trains our mind and memory, so our imagination will be improved. In addition, there are many kinds of books which are suitable for people of all ages such as: comics, novels, folk stories, science books,...In short, books are not simply informative but also inspirational, so teenagers should reading books in their free time.
