1) Learning objectives: To improve children’s ability in thinking, observation and attentiveness and to enrich their knowledge.

2) Theoretical guidance: Modern cognitive psychology believes that the classification ability is an important standard to measure children’s intelligence. With the continuous development in the level of children's thinking, children aged 4-5 can classify things according to certain characteristics, while children aged 5-6 can classify things according to multiple criteria, and they can even understand the relationship between the levels.

3) Creative learning: The game “Odd One Out” is designed in accordance with age characteristics of children to help them know and classify different objects. It can not only broaden children’s knowledge, but also helps to develop their inferential and intelligent capability.

4) Suggestions for parents: The development of children's thinking ability is closely related to daily life, and parents' education is very important. For example, ask children to help clean the room, clean up toys, and put the same items into a box. These things can not only improve children's self-independence, but also help children to be an organized person in life.