1. Plant growth observation: Let children observe the growth process of different plants, and let them know the growth process and vitality of plants by planting bean sprouts, observing flowers and observing the changes of trees.

2. Animal observation: You can take children to zoos, parks and other places to observe animals, and you can also learn about the characteristics and living habits of different animals through books, videos and other media.

3, object observation: children can observe the shape, color, texture and other characteristics of different items, such as observing the state change of water, observing the melting of ice.