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You’re probably familiar with the domino effect - wherein one event or action sets off a whole series of others. Your child’s development happens in much the same way. Take vision for example. When babies are born, their view of the world is limited. And not just because their early vision is blurry. Newborns also lack the neck strength to control the movement of their heads, meaning that their ability to direct their gaze is highly restricted. But by three months, it’s a whole new ballgame, with both improved visual acuity and newfound neck strength enabling them to direct their gaze in the direction of their choosing. And even to follow objects in motion. In this case, your baby’s improved head and neck control serves as an aid to their visual tracking. Check out this little guy for example. He’s tracking the crab with his eyes, but notice how much head movement is also involved. When development in one area begets development in another (or, in some cases, multiple others), we call this a developmental cascade. It’s one reason that the development of entire collections of new skills seem to appear as if overnight. Once the first domino falls, look out… because many more will follow in rapid succession. This skilled visual tracker was shared to TT by Staceyrhorowitz.