What gross motor skill is achieved by most children by 6 months of age?

By 6 months of age, most children typically achieve the gross motor skill of sitting up. This milestone is significant as it indicates that the child has developed sufficient trunk strength and control. Around this age, infants generally transition from laying down to sitting with minimal support, which reflects their growth in muscle coordination and balance.

Sitting up also enables infants to engage more actively with their environment, allowing them to observe and interact with the world around them. This skill serves as a foundation for future gross motor milestones, such as crawling and eventually walking, as it fosters stability and spatial awareness.

The other skills mentioned, such as pulling to stand, rolling over, and walking, develop at varying rates. While many babies begin to roll over as early as 4 months, pulling to stand and walking typically occur after the age of 6 months. Thus, sitting up is recognized as a landmark achievement in gross motor development by this age.