Motor development during infancy and toddlerhood is a foundational aspect of human growth, encompassing the gradual acquisition of gross motor skills that involve large muscle coordination and fine motor skills requiring precision of hands and fingers. These milestones reflect the integration of biological maturation, neural development, sensory processing, and environmental experience. Although motor development follows a broadly predictable sequence, each child’s pace varies depending on genetic factors, opportunities for practice, socio-cultural context, and the quality of caregiver interaction. Infancy begins with limited motor control, where movements are largely reflexive. In the early months, primitive reflexes such as the rooting reflex, sucking reflex, Moro reflex, and grasp reflex serve as survival and neurological indicators. Around two months of age, infants begin to lift their head when lying on their stomach, marking one of the earliest gross motor milestones and reflecting strengthening of neck and upper-body muscles. By three to four months, most infants are capable of holding their head steadily without support and begin rolling from side to side. Rolling from stomach to back typically emerges around four to five months, followed by rolling from back to stomach around six months, illustrating increasing core muscle control. Sitting is a major gross motor milestone that appears between six to eight months. Initially, infants sit with support and gradually attain independent sitting, which enables a new range of exploratory behaviors. By nine months, infants often begin to crawl or creep, although some children adopt alternative locomotion methods like scooting or skipping crawling altogether and moving directly to pulling up. Pulling up to a standing position and cruising while holding onto furniture typically appears around ten to twelve months. Walking independently is one of the most celebrated milestones of toddlerhood and generally occurs between twelve to fifteen months, although walking anytime between nine and eighteen months is within normal variation. As toddlers become more confident, running, climbing, walking upstairs with assistance, and improved balance emerge around twenty to twenty-four months. By age two, children usually kick a ball, jump with both feet, and begin throwing objects, demonstrating substantial development in coordination and spatial awareness. Fine motor milestones develop along a similar pattern of