Birth – 3 Months:

• Startles to loud sounds
• Quiets or smiles when spoken to.
• Seems to recognize your voice and quiets if crying.
• Increases or decreases sucking behavior in response to sound.

Birth – 3 Months:

• Makes pleasure sounds (cooing, going)
• Cries differently for different needs.
• Smiles when sees you.

4–6 Months:

• Move eyes in direction of sounds.
• Responds to changes in tone of your voice. 
• Notices toys that make sounds.
• Pays attention to music.

4–6 Months:

• Babbling sounds more speech-like with many different sounds, including p, b, and m.
• Vocalizing excitement and displeasure.
• Makes gurgling sounds when left alone and when playing with you.

7 Months – 1 Year:

• Enjoys games like peek-a-boo and      pat-a-cake.
• Turns and looks in direction of sounds
• Listens when spoken to.
• Recognizes words for common items like “cup”, “shoe”, “juice”.
• Begins to respond to requests (“Come here”, “Want more?”). 

7 Months – 1 Year:

• Babbling has both long and short     groups of sounds such as “tata upup    
  bibibibi.”
• Uses speech or non-crying sounds to get and keep attention.
• Imitates different speech sounds.
• Has 1 or 2 words (bye-bye, dada,   mama) although they may not be clear.

1-2 Years:

• Points to a few body parts when asked.
• Follows simple commands and
• understands simple questions (“Roll     
  the  ball”, “Kiss the baby”,  “Where’s your shoe?”).
• Listens to simple stories, songs, and     rhymes.
• Points to pictures in a book when      named.  

1-2 Years:

• Says more words every month.
• Uses some 1-2 word questions (“where kitty?” “go bye-bye?” “what’s that?”).
• Puts 2 words together (“more cookie”,  “no juice”, “mommy book”)
• Uses many different consonant sounds at the beginning of words.

2-3 Years:

• Understands differences in meaning       (“go-stop”, “in-on”, “big-little”).
• Follows two requests (“Get the book and put it on the table”). 

2-3 Years:

• Has a word for almost everything.
• Uses 2-3 words to talk about and ask for things . 
• Speech is understood by familiar       listeners most of the time.
• Often asks for or directs attention to     objects by naming them. 

3-4 Years:

• Hears you when you call from another room.
• Hears television or radio at the same loudness level as other family members.
• Answers simple “who?”, “where?”,      “what?”, “why?”, questions.

3-4 Years:

• Talk about activities at school or at     friends’ homes.
• People outside family usually      understand child’s speech.
• Uses a lot of sentences that have 4 or  more words.
• Usually talk easily without repeating syllables or words

4-5 Years:

• Pays attention to a short story and answers simple questions about it.
• Hears and understands most of what is said at home and in school.

4-5 Years

• Voice sounds clear like other childrens.
• Uses sentences that give lots of details (I like to read my book).
• Tells stories that stick to topic.
• Communicates easily with other      children and adults.
• Says most sounds correctly except a       few like l, s, r, v, z, j, ch, sh, th.