Many believe the end of the third month is a milestone for both parents and their baby. By now, your baby may have developed a routine for sleep, feeding, and play. She is also now very clear about her cues, and you will probably find yourself telling people all about your baby's particular habits, likes, and dislikes.
You may notice Baby holding up her head steadily when upright. When she's on her tummy, she may even hold herself up at 45 degrees. Try holding her upright on her feet. Does she bear some weight? While you are playing, put your baby in different positions—supporting her while sitting, standing against your chest, on her back under a dangly set of toys and on her tummy. All of these fun baby activities help her gain muscle strength.
Has your baby discovered her hands? They move, can be easily seen, have funny little fingers, and fit in her mouth. Baby will begin to play with these new "toys" by moving them, wiggling her fingers, sucking on them, and watching them intently.
Bringing both hands to her midline and clasping is another discovery. Soon, Baby will realize that her hands can be used as tools. She will begin touching interesting objects and holidng objects, like a baby rattle, in her hands. She may even notice that she can make noise when she moves her rattle. This is the beginning of Baby's understanding of cause and effect.
For a real treat, prop Baby in front of a mirror. Some babies gaze at their reflection intently, while others squeal and laugh. Shatterproof mirrors make wonderful toys for babies. Support this play by talking about what she sees: her nose, head, and eyes. She will love the attention and will surely smile back at the face in front of her.