feelings: happy and sad

When I am reading some books, sometime I will laugh, but sometime I will sad. The book "Avatar the Last Airbenter" that book make me laugh, because that book is funny and that book is not hard to let me read it. The book " My Name is Maria Isabel" that book make me sad, because it is not funny and it is not a hard book to read, so I can feel I am sad. In the book " Avatar the Last Airbenter" a boy name Avatar he put his tongue in the fan and then talk to someone, it make me laugh. Another thing in that book make me laugh is that a Waterbenter people do a Earthbenter people's thing, and let some Firebenter people saw it , then they catch him. In the book " My Name is Maria Isabel" Maria fall when she go to take school bus, a person didn't go to help her, he just said hurry up, that make me sad. At the end the teacher let her name is Maria, and let her sing on the stage, that make me laugh again.