2. Ball: 6-month-old babies are interested in moving things, and colorful balls that roll attract them most.

3. Building blocks: 8-month-old babies have known toys, furniture and other items, and learned that some objects are soft and some are hard.

4. Complex shape box: This is a toy for training and observing the shape of objects. Through this toy, children can know a shape gap.

5. Music table: All children love music. After 18 months, children have learned to choose their favorite music category.