Gus has begun to babble and he quite enjoys it. It's like a little game to him, making sounds and combining syllables. We have started him on solid foods and he loves them; hasn't rejected a single thing yet. He's starting to figure out how to crawl, and I say that in the loosest terms. Basically, he gets up on his knees and lunges forward. He has begun to experience a little bit of stranger anxiety (must love his mama). And he enjoys sitting on the floor, playing with toys and his brother.