During a routine well-child visit, a nurse is assessing the development of a 6-month-old infant. The nurse understands that developmental milestones are crucial indicators of an infant's growth and well-being. In order to support healthy growth, it is important to identify the appropriate developmentally appropriate activities for this age group. Which of the following activities should the nurse promote to the parents as suitable for their 6-month-old infant?
Select all that apply: