Subject Verb agreement: It likes vs I like.
After reading the book called The Very Hungry Caterpillar, ask your students what kinds of food does the caterpillar likes to eat. List them on the board. Then, ask your students what kind of food they like to eat. List them on the board. Explain to the students that in English, a verb that follows a singular noun need "s" at the end. He likes, She likes, It likes.