By the age of 18 months, infants can typically produce about 50 words and begin to make word combinations.

During the first two months after birth, the infant is guarded by its mother and begins to develop a close bond.

At around 9-12 months infants begin engaging in joint attention.

Around 5 months of age, infants begin to express themselves by babbling.

The infant will begin to paddle and kick in a swimming motion.

The age when infants begin showing a preference for color is at about 12 weeks old.

By the time the infant is a year old and begins to walk, they are generally finished with cradleboard use.

But around one year of age, infants begin to realize that the distress is being felt by someone else.

At 9 months of age, infants begin to display triadic joint attention.

Through play with toys infants begin to recognize shapes and colors.