i noticed after 6-8 weeks she was alot more interactive, started smiling and cooing which was nice. now shes 12 weeks shell talk jibberish to me for ages and sometimes giggles and its sooo cute! she also is proper into everything now and grabbing stuff and when she wakes up in the night and i go and see her to give her bottle she will smile at me and laugh even tho i dont say anythng, jsut when she sees me its really nice