Children need to learn to use language creatively and not to take things so literal. This is a good book to introduce them to idioms. Being from the south, I heard a lot of idioms growing up and that is how I learned them. I remember being little and my dad saying that he could remember when I "was only knee high to a grasshopper." I remember thinking, I was never as small as a grasshopper so I decided to talk to him about it. He explained it to me and from then on, I would question his meanings, but I soon caught on. Students can use a poster to highlight the literal and figurative meanings of words. This would be a good book to start with your second graders.