The high contrast card for infants aged 3 to 6 months is a specially designed visual stimulus promoting early cognitive development. These cards typically feature bold, black-and-white patterns that attract and engage young babies' developing eyesight. The stark contrast between the dark and light elements on the card helps stimulate the visual cortex and encourages infants to focus and track the patterns. This type of visual stimulation is essential during the early months when an infant's eyesight is still developing. By introducing high-contrast cards, caregivers provide a simple yet effective means to support the visual and cognitive growth of the infant, fostering early learning experiences through visual engagement.