This document provides developmental milestones and activity suggestions for infants aged 0-6 months. It describes how infants in this age range begin to socially interact with others through smiling, cooing, and responding to emotions. Suggested activities to support development include singing songs while using hand gestures, reading books together, playing peek-a-boo with toys, and talking or singing during daily routines like feeding, bathing, and dressing. Milestones listed for different age ranges include following objects with their eyes, responding to their name, and rolling over.