For children who are not yet able to understand gestures and verbal signs, training is used to achieve understanding of basic concepts through the manipulation of objects and the discriminative manipulation of multiple objects. (1) Indications: Delayed language development caused by various reasons. (2) Contraindications: None. 3.Equipment and apparatus Various kinds of objects, pictures, etc. (1)Basic concept learning training: Through imitation, children can understand the uses of everyday objects around them. (2) Learning training of discrimination of various things.