Help your child better understand main idea by brainstorming ideas. Using a piece of writing paper, have your child think of one activity or idea that interests him/her and write it at the top of the paper. For example, your child might choose to write ideas about “making paper airplanes”. Children must then think of all the phrases that express ideas that go with their topic. For example, the type of paper to use, the way to fold the paper, and the way to throw the plane. Everything that is added under the idea of making paper airplanes becomes the details, while the making of paper airplanes is the main idea of all of the other phrases.