As a nurse caring for an infant aged 6 months, you are educating the parent about the developmental milestones that should be achieved during this stage. One important aspect of growth is the ability to sit without support. By the age of 6 months, an infant should be able to sit independently for a brief period. It is also crucial for parents to understand the recommended age range for introducing solid foods into the infant's diet. The American Academy of Pediatrics suggests that solid foods should typically be introduced at around ______ months of age. This transition is vital for the infant's nutritional intake and developmental progress.