Answer:
Three nouns: pencils, paper, books.
Step-by-step explanation:
A noun is a word that names a thing, a person, animal, place, idea, feeling, quality, phenomenon, substance, etc., in other words, it is a word that names something or someone.
In the sentence, pencils, paper and books are all nouns because they name things. The other words, on the other hand, are not nouns: she is a pronoun (a substitute of a noun), brought is a verb, and is a conjunction, with is a preposition and her another pronoun.