When can babies typically respond to mobiles?

Babies typically begin to respond to mobiles when they are able to see objects at a distance. This visual ability develops as their eyesight improves. Initially, newborns can see only about 8 to 12 inches in front of them, which is just the distance needed to connect with a caregiver during feeding. As they grow, their visual acuity and ability to see farther increase, allowing them to visually track objects like mobiles hung above their crib. Once they can focus on these objects and distinguish features, they start to respond to the movement and colors of the mobiles, which can engage their attention and curiosity.

The other options do not accurately reflect the developmental stage associated with responding to mobiles. Crawling is a later developmental milestone and does not directly relate to visual response. Recognition of colors also comes after babies have developed the ability to see objects at a distance. Lastly, while holding their heads up is an important physical development, it precedes their ability to effectively focus on and interact with distant objects.