Toys such as dolls, houses, furniture, cooking utensils, various means of transportation, hospital appliances, etc. can be used by babies when playing role games. In the role game, the baby mainly uses language to express the plot and content of the game, so it can promote the development of the baby's language ability. For example, the game of "cross the house" allows the baby to imitate the mother, coax the baby to sleep and feed the baby. The expansion and change of each plot in the game can make the baby imitate the "mother"'s language and actions, which is much better than teaching the baby to imitate.