1.Knows familiar faces and begins to know if someone is a stranger

2.Likes to play with others, especially parents

3.Responds to other people’s emotions and often seems happy

4.Likes to look at self in a mirror

5.Responds to sounds by making sounds

6.Strings vowels together when babbling (“ah,” “eh,” “oh”) and likes taking turns with parent while making sounds

7.Responds to own name

8.Makes sounds to show joy and displeasure

9.Begins to say consonant sounds (jabbering with “m,” “b”)

10.Looks around at things nearby

11.Brings things to mouth

12.Shows curiosity about things and tries to get things that are out of reach

13.Begins to pass things from one hand to the other

14.Rolls over in both directions (front to back, back to front)

15.Begins to sit without support

16.When standing, supports weight on legs and might bounce

17.Rocks back and forth, sometimes crawling backward before moving forward