* Raise head slightly when lying on stomach
* Hold head up for a few seconds, when supported by someone holding them
* Hold hand in a fist
* Lift head and chest, while lying on stomach
* Touch, pull, and tug own hands
* Repeat body movements
Babies are quickly becoming stronger and more agile. Most begin to:
* Roll over
* Push body forward and pull body up by grabbing the edge of a crib
* Reach for and touch objects
* Reach, grasp, and put objects in mouth
* Make discoveries with objects (for example, a rattle makes noise when it is moved)
"Child-proofing" becomes important as babies get more mobile. During this time most begin to:
* Crawl
* Grasp and pull things toward self
* Transfer objects between hands
By this time, most babies can:
* Sit without support
* Stand unaided
* Walk with aid
* Roll a ball
* Throw objects
* Pick things up with thumb and one finger
* Drop and pick up toys
