Brooke is now 1/2 way through her 4th month ;)
At this point most babies can raise themselves up on their arms ... which Brooke can do, when she chooses to. Sometimes I place her on her belly and she pushes herself up and looks around smiling. Other times she plants her face into the ground and screams. Its about 50/50 :) Babies Online says some babies start to army-crawl (using primarily the arms to scoot around) at this point. Brooke is actually the reverse - she is all about legs! When I put her on her tummy she kicks and pushes with her legs and usually ends up moving backwards.
Vocal development also continues, and babies "vocabulary" grows. Brooke is babbling all of the time now, and we have notices she "complains" when she is tired. She just talks and talks, but in a complaining tone. You can tell if she could say real words they wouldnt be nice ones :) I think it's a good thing it takes them a while until they master the english language ....