By now, your baby may be able to lift his or her head while lying tummy-down, follow objects briefly with his or her eyes, and vocalize with oohs and aahs. Some babies will even smile and laugh.

Of course, all babies are unique and develop at their own pace. If your baby was premature, keep in mind that kids born early usually need a bit more time to reach milestones. Talk to your baby's healthcare provider if you have any concerns.