What type of toy is typically unsuitable for children aged 9-12 months?

For children aged 9-12 months, complex puzzles are typically unsuitable due to their developmental stage and cognitive abilities. At this age, babies are beginning to explore and manipulate objects, but their fine motor skills and problem-solving skills are still in the early stages of development. Puzzles often require a level of fine motor coordination, cognitive ability, and understanding of spatial relationships that infants in this age group have not yet fully developed.

In contrast, talking toys, push/pull toys, and musical instruments are designed to engage infants more appropriately. Talking toys can help with language development, push/pull toys encourage mobility and coordination, and musical instruments foster sensory exploration and auditory skills. Each of these toy types aligns with the developmental capabilities and interests of children in this age group, making complex puzzles less suitable compared to the other options.