1. Reading picture books: Three-year-old babies have been able to understand some simple storylines, and they can be shown some picture books suitable for their age to help them develop their reading interest and language ability.

2. Parent-child games: Simple parent-child games, such as piling trees and puzzles, can help your baby develop hand-eye coordination and spatial imagination.

3. Singing and dancing: Teaching your baby to sing some simple children's songs and dance some simple dances can help your baby improve his sense of music and rhythm.

4. The Imitation Game: Let the baby imitate the actions of adults, such as making phone calls and cooking, which can help the baby understand and learn some skills in daily life.

5. Natural observation: Take the baby to parks, zoos and other places, let the baby get in touch with nature, learn about various animals and plants, and cultivate the baby's spirit of observation and exploration.

6. Social activities: Let your baby participate in some small social activities, such as playing with other children, which can help them learn to communicate and share with others.

7. Artistic creation: Encourage your baby to do some simple artistic creation, such as painting and paper cutting, which can stimulate their creativity and imagination.

8. Scientific experiments: Some simple scientific experiments, such as planting bean sprouts and doing volcanic eruptions, can make your baby interested in science.

9. Healthy living habits: It is very important for their growth to educate their babies to develop good living habits, such as eating regularly and paying attention to brushing their teeth.

10. Emotional management: Teaching babies to recognize and express their emotions, such as happiness, sadness and anger, can help them build good emotional management skills.