As infants and toddlers interact with other people their social and emotional skills develop. Here are some social and emotional milestones that they typically experience during the first two years. By two months of age most children begin to smile at people, can briefly calm themselves, may bring their hands to their mouth and suck on their hands, try to look at their parent. By four months of age most children smile spontaneously especially at people, like to play with people and might cry when playing together stops , [from video, woman singing with infant] As fast as you can. You roll it. You pat it. You mark it with a 'C'. [presenter] copy some movements and facial expressions like smiling or frowning. By six months of age most children know familiar faces and begin to know if someone is a stranger, like to play with others especially their parents, respond to other people's emotions and often seem happy [from video; mother makes sounds and interacts as infant laughs and giggles] like to look at themselves in a mirror. By nine months of age most children may be afraid of strangers, maybe clingy with familiar adults [from video] Hey Frida, you want to come? No? Come on. Oh, it's okay, it's okay. have favorite toys, [from video] [child squeals] [from video woman] You're getting excited that's your favorite one, huh? [presenter] By 12 months of age most children are shy or nervous with strangers, [from video, woman] Oh, how are you? You gonna come? [presenter] Cry when mom or dad leaves, [from video, mother leaving] Bye Bruce. Bye-bye. [child cries] [from video, woman] It's okay. [child reduces crying] [presenter] Have favorite things and favorite people to be with, show fear in some situations, [from video, woman] You got him, touch the nose. Yeah. [from video] [toy says 'Yeah!'] hand you a book when they want to hear a story, repeat sounds or actions to get attention, [from video, woman] Yeah! Do you wanna play one? Yeah! [from video] [Child makes excited and communicative sounds] [from video, woman] Oh, thank you. put out their arm or leg to help with dressing play games such as peekaboo and pat-a-cake. By 18 months of age most children like to hand things to others during play, may have temper tantrums, [from video, child crying] [from video, woman] Can I see it? [from video, child crying] [from video, woman] Thank you. [from video, child crying] [presenter] may be afraid of strangers, [from video, woman] It's okay sweetie. [from video, woman] What you got here? [from video, woman] It's okay. It's okay Coco I'm right here. [from video, woman] Okay, it's okay. [from video, woman] We're gonna meet new people every day [presenter] show affection to familiar people, play simple pretend such as feeding a doll, [from video, child makes animal growl sounds] [presenter] may cling to caregivers in new situations, point to show others something interesting, explore alone but with a parent close by. By 24 months of age most children copy others especially adults and older children, get excited when they are with other children, show more and more independence, show defiant behavior doing what they have been told not to do, [from video, woman] Rub them together. You know what to do. Rub both of them together...Come on, rub them together....[child whines and stamps feet]...Come on. [presenter] play mainly beside other children but are beginning to include other children in play such as in chase games. By 36 months of age most children copy adults and friends, show affection for friends without prompting, take turns in games, [from video, child] It's your turn! [says child's name] your turn. show concern for a friend who is crying, understand the idea of mine and his or hers, [from video, child] That's her's. [from video, woman] Who's? [from video, child] That's her's....That's hers. [from video, woman] Okay...who's is this one? [from video, child] Mine. That's mine. [presenter] show a wide range of emotions, separate easily from mom and dad, may get upset with major changes in routine dress and undress themselves