Week 30. - Newborn's 30. week - what to expect

I’m able to find toys that you hid from me and I follow moving objects with my eyes.
I’m becoming more and more social and I’m looking for contact with you and my environment.
I’m beginning to understand the concept of object permanence. I suspect that hidden objects don’t disappear forever.
My first baby teeth are growing but even without them I’m gaining skills of biting and chewing.
I begin to show my emotions more and more. I’m happy to see people I know and I keenly react to known sounds.