Full color vision should be fully developed by 14 weeks old (3 months old) or so. At this time, Juli sat with a pillow support and enjoyed standing with support as long as she liked. She leaned forward herself when she wanted to get up. She tried it by herself often.
Juli looked at the picture where I pointed at and then shifted her gaze at me for the ASL word. And then she gazed back at the next picture and looked at me for the word; one after another.
This was a milestone that I really noticed how Juli shifted her gaze between ASL signed word and picture. A milestone in sign language acquisition.
It appears that Juli realized that finger-pointing is the link between a signed word and its picture, and thus a connection between the object and its name.
A week later (m4w2), Juli has been increasingly alert -- becoming quite an active observer. She began to scratch regularly on the top of my hand or forearm (whenever I held her) when she attempted to grasp. Manual play (babbling).
Her eye track followed me from one direction to any other direction, perhaps so that she knew or could confirm where I was.
That was what I first noticed when I walked toward the kitchen from her (sitting in the rocker facing the opposite direction) in the family room.
She turned her head and eyes 180 degrees and looked at me while I stood in the kitchen. I never forget the look in her eyes.
As soon as she saw where I was, she turned her head around and relaxed.
Juli (m4w4) enjoyed watching herself and her mother (myself) in the mirror. I brought her close to the surface to let her touch the mirror. She seemed to ponder about this experience of the world on a flat surface.
It had been almost a month since Juli began doing gaze-shifting between an object or picture and a signer. Juli continued to shift gaze between the object and the signer's talk in ASL.
Juli shifted her gaze between the object she held onto and the signer's utterances. She had developed this significant skill of gaze shifting.
Video clip (week 14): "Wanna orange?" Juli looked excited. She had tasted the orange last week. "Sorry, no orange left. Wanna strawberry?" Juli looked grumpy. Introduced the garlic to Juli in scent and word. Juli looked unpleased when sniffing it.
Video clip: The original moment of the kiss game was not captured, unfortunately. A second time wasn't always the better.
Also see Eye contact in sign language