Hi baby will start smiling and recognizing you, few might roll over and do chin up. Will use their mouth to explore things hence will put their fingers , toys inside their mouth.

<span style="color:#3B5998;"><b><a href="http://app.babychakra.com/article/1048">Baby&#8217;s Development Milestones: 3 - 4 Months</a></b></span>