1) Learning objectives: To improve children's addition and subtraction ability, cultivate their ability of logical thinking, and stimulate children's desire to challenge themselves.

2) Theoretical guidance:Vygotsky proposed that the essential feature of education is to create the “Zone of Proximal Development”, which is a slightly higher development zone than children’s current level and a zone that can be reached through endeavor. Such learning content is challenging for children and can stimulate their enthusiasm, which is also the most attractive therefore.

3) Creative learning: From 5-6,the children’s understanding of the relationship between numbers and quantity is further developed, and they can understand the equivalence relationship between totality and portions. In the game “All Aboard”, children observe the number of animals in the carriages and add the missing number of animals to correspond to the total. If the answer is right, the train will drive away with animals. The interesting game stimulates children’s learning interest while appropriate game difficulty can not only meet children’s current development level but also develops children’s potential in the “Zone of Proximal Development” with certain challenges.

4) Suggestions for parents: When educating children, parents should pay attention to children’s “Zone of Proximal Development”. Don’t measure children’s level with adults’ thinking. Encourage children to challenge themselves and develop their potential. For example, try to ask children to help with accounts settlement.