Rollin', rollin', rollin'
Your baby's stronger neck and arm muscles allow him to practice rolling over toward one side, a milestone that will probably awe and amuse you. Your baby might adopt rolling as his primary mode of ground transportation for a while, or he may skip it altogether and move on to sitting, lunging, and crawling. As long as your baby continues to gain new skills and shows interest in getting around and exploring his environment, don't worry.
Rolling over can be fun for your baby, but it can also be nerve-racking for you. Keep a hand on your baby during diaper changes, and never leave him unattended on a bed or any other elevated surface.
Your little social butterfly
At this age your baby not only tolerates attention from others, he'll often initiate it. Though you may soon notice the beginnings of stranger anxiety, your baby will probably still be fairly indiscriminate: Chances are anyone who approaches him with welcoming eyes or a grin delights him and becomes an instant friend. But don't worry — he still needs and craves lots of love and attention from you.
Your baby is also learning that his behaviors, both the ones you like and the ones you don't, engage you, so starting now (and for years to come) he'll do just about anything to get your attention. Right now almost everything he does is endearing, but as he gets older, he's more likely to get into mischief to provoke a reaction from you. Just don't forget to give him positive feedback when he's being good. It's a great way to start teaching right from wrong.
One thing will become clear: Your baby is beginning to expand his attention-getting repertoire to include more than crying. You may notice him wriggling, making noises, blowing "raspberries," and so on. Over the next three months, he'll develop a uniquely personal way of letting you know what he thinks, wants, and needs.
Dressed for success
As your baby starts becoming more active, he'll appreciate wearing comfy clothes. Opt for soft fabrics that won't chafe him as he's moving around. Loose, stretchy, and breathable clothing is also smart as it provides your energetic little one plenty of wiggle room.
Avoid clothes with rough or scratchy seams; long ties, buttons, or bows (could be a choking hazard); and anything else that gets in the way of your baby's sleeping, crawling, playing, or other regular activities.
In your baby's diaper
Don't be surprised if your baby's stools change color and odor as soon as he starts eating even tiny amounts of solids. This is normal. If his stools seem too firm, switch to other fruits and vegetables and oatmeal or barley cereal. (Rice cereal, bananas, and applesauce may be constipating.)
Remember, your baby is an individual
source: babycenter