Children aged 3 ~ 4 belong to the stage of intuitive action thinking. At this stage, children are trained in reverse thinking, mainly by creating a relaxed, interesting and pleasant game environment, so that they can germinate their interest in thinking and operate by themselves, so that they are often in an active state.

4 ~ 5 years old is the key stage of children's thinking activity development. At this stage, children's thinking has entered the concrete image stage. The purpose of training children aged 4-5 in reverse thinking is to enrich their knowledge, develop their language and help them learn to think positively and negatively and make judgments.

At the age of 5 ~ 6, children's abstract logical thinking developed rapidly, which laid an intellectual foundation for their admission to the park. At this stage, children have begun to use concepts, judgments, reasoning and other forms of thinking for thinking activities. Training children aged 5-6 in reverse thinking is mainly to help them look at their own inherent views and common views from the opposite angle, learn correct thinking methods, and develop their reverse thinking through various creative activities.