When does a child's understanding of prepositions and more complex sentences typically develop?

A child's understanding of prepositions and more complex sentences typically develops around 30 months. At this age, children are becoming more adept at language skills, and they start to use and understand a wider range of vocabulary and grammatical structures. By 30 months, many children can follow simple instructions that include prepositions, such as "put the ball under the table," and can create sentences that contain more than one phrase, indicating their growing ability to process complex language.

During this developmental stage, children also begin to grasp the concept of relationships between objects, which is crucial for understanding prepositions. This ability is supported by their cognitive development as they refine their communication skills and begin to express more detailed thoughts about their environments and experiences. As they approach this age, you can expect to hear them experimenting with language and demonstrating an increased understanding of how words and phrases link together to convey meaning.