In this Chinese article, pay attention to the measure words used.
Although you should not say 一个橡皮, (it should be 一块橡皮); all Chinese people will understand if you say the first one.
李明: 小红，你的文具盒好漂亮啊！
里面有什么呢？
小红：文具盒里面有三根铅笔、一块橡皮、一个转笔刀，两支笔、还有我的课程表。
李明：你准备的真多！
Hover a word for its pinyin & meaning; click to pin it.
李明：Xiaohong, your pencil case is very beautiful. What is inside it? 小红：In my pencil case there are three pencils, one eraser, a pencil sharpener, two pens and also my class schedule. 李明：You are really prepared!