A study of over 7,000 infants reveals that one to four hours of screen time daily can lead to developmental delays, particularly in problem-solving and communication skills, by age 2. Babies with up to four hours of daily screen time face a three-fold higher risk of communication and problem-solving skill delays, while those with four or more hours face increased risk in multiple areas, including social and fine motor skills. Experts emphasize the importance of face-to-face interaction, playtime, and alternative engaging activities, such as high-contrast toys and books, to mitigate the negative effects of excessive screen time in infants.