Birth to 3 months: 
Does the
child: 
• make cooing sounds 
• have different cries for different needs 
• smile at you 
• startle to loud sounds 
• soothe/calm to a familiar voice 
4 to 6 months: 
Does
the child: 
• babble and make different sounds 
• make sounds back when you talk 
• enjoy games like peek-a-boo 
• turn his/her eyes toward a sound source 
• respond to music or toys that make noise 
7 to 12 months: 
Does
the child: 
• wave hi/bye 
• respond to his/her name 
• let you know what he/she wants using sounds, and/or actions
like pointing 
• begin to follow simple directions (e.g., Where is your nose?) 
• localize correctly to sound by turning his/her head toward the
sound 
• pay attention when spoken to 
By 12 to 18 months: 
Does
the child: 
• use common words and start to put words together 
• enjoy listening to storybooks 
• point to body parts or pictures in a book when asked 
• look at your face when talking to you 
By 18 to 24 months: 
Does
the child: 
• understand
more words than he/she can say 
• say
two words together (e.g., More juice) 
• ask
simple questions (e.g., What’s that?) 
• take
turns in a conversation 
2 to 3 years: 
Does
the child: 
• use
sentences of three or more words most of the time 
• understand
different concepts (e.g., in-on; up-down) 
• follow
two-part directions (e.g., take the book and put it on the table) 
• answer
simple questions (e.g., Where is the car?) 
• participate
in short conversations 
3 to 4 years: 
Does
the child: 
• tell
a short story or talk about daily activities 
• talk
in sentences with adult-like grammar 
• generally
speak clearly so people understand 
• hear
you when you call from another room 
• listen
to TV at the same volume as others 
• answer
a variety of questions 
4 to 5 years: 
Does
the child: 
• pronounce
most speech sounds correctly 
• participate
in and understand conversations even in the presence of background noise 
• recognize
familiar signs (e.g., stop sign) 
• make
up rhymes 
• hear
and understand most of what is said at home and school 
• listen
to and retell a story and ask and answer questions about a story