The document discusses flannel boards, which are visual display aids used for storytelling. A flannel board consists of a rigid surface covered with flannel or felt fabric that allows pictures and cards to be attached by gentle pressure. Flannel boards are used in education to convey ideas in an engaging way and add variety to classroom activities. They allow teachers to build up ideas step-by-step and provide information to students in an appealing manner. Flannel boards have advantages like being inexpensive and holding students' attention but require advance preparation and artistic ability to use effectively.