1. colored ball: let the baby roll behind the ball, which can exercise the baby's tracking ability and hand-eye coordination.

2. Puzzle: Puzzle games suitable for different ages can help babies develop spatial cognition and hand-eye coordination.

3. Three-dimensional puzzle: By stacking different building blocks, let the baby build a three-dimensional structure to help the baby develop spatial cognition and finger flexibility.

4. Children's books: Rich patterns and words can help babies learn basic knowledge such as shapes, colors and letters.

5. Mirror: You can let your baby observe your facial expressions and movements, and help your baby develop self-awareness and expressive ability.

6. Musical toys: such as drums and bells. You can let your baby feel the rhythm and tone through hearing and vision.