I don't understand
My daughter and a friend picked up the idea of making their own book at school. They each folded about five sheets in two and asked the teacher to staple the papers together. She said: what a nice idea, but don't do it again because using so much paper is too expensive (!??). So yesterday evening I've been making some blank books to fill with their own stories. With printer-sheets and covers made from secondhand books with loose pages. Not expensive at all! She took one to school today.