Your baby's third month ushers in your newborn's first "graduation." Your little one has now made the transition from newborn to bona-fide infant! As your baby enters this stage of growth, your infant's budding personality becomes more apparent, and you'll start to notice silly, serious, finicky, or determined traits emerge. As your baby becomes more self-possessed, you may also notice that your little one is starting to favor you above other people. Your infant will show preference for YOUR company by smiling, laughing, and waving those little arms and legs when you're around. On the flipside, though, your infant may act more wary around strangers, or even fuss when new people want to interact with him. When not busy making faces, the baby will continue to eat voraciously, and will grow rapidly as a result. The average three-month-old infant will weigh in at 13 pounds and measure 24 inches, although anything from around 9 to 16 pounds and 15 to 22 inches is normal. Sleeping is still the biggest part of your baby's life., Hopefully your little one is FINALLY beginning to learn that nighttime is the time to sleep. Some lucky moms even find that their three-month-olds will sleep for up to 6 hours at a time. Regardless of how much your baby sleeps, when awake, your baby may surprise you this month by rolling over halfway. Your infant is also probably doing baby "push-ups," or using those arms and shoulders to lift that head high when playing on his front. Encourage these efforts by clapping and telling your baby how proud you are of these new skills. But remember that anything within your baby's reach is fair game. Be sure to watch your little one carefully, however, to make sure that the things being grabbed are infant-appropriate!