This sceince video teaches a very basic concept to the kids- how various animals are classified in different categories and why. The similarities and differences among various classes of animals are very well explained in this video for grade 4 kids.Have you ever visited a library or a large book shop?There are thousands of books related different topics. Have you realized that these books are arranged under some titles like story books,cooking books,study books for different grades etc. Do you know why this is done? This is done to help the reader or students to sort out the books in an easy manner.All books related to one subject or class are put in one section.This is called classification.Scientists have done the same thing for classifying living organisms.