Makes throaty sounds
Responds to sound of voice
Momentary head lift
Hands fisted
Regards face
Follows to midline
1 month
Coos spontaneously
Lifts head 45 degress whil prone
Regards hand
Smiles responsively
Follows to 90 degrees
2 months
Squeals and laughs
Turns to sound
Lifts head 90 degrees when prone
Hands together
Grasps objects
Regards raisen
Smiles spontaneously
Vocalizes at mirror
Sustained regard for object in hand
4-5 months
Single syllables
Imitates sounds
Sits alone
Palmar grasp
Reaches and transfers
Feeds self cracker
Looks for dropped object
6-7 months
"mama" "dada" nonspecific
Follows one step command with gesture
Gets to sitting
Pulls to stand
Cruises
Pincer grasp with palm
Bangs two cubes
Peekaboo
Stranger anxiety
9-10 months
Says words
Points
Follws one step command, no gestures
Stands alone
Unassisted pincer grasp
Plays with ball
Object permanence after visible displacement
12 months
Says 4-6 words
Ponts to >1 body part
Walks up steps holding rail
Builds a tower 3-4 cubes
Imitative play
Drinks from cup
18 months
2-3 word sentences
Speech 50% understandable
Points to six body parts
Follows two step command
Jumps in place
Build tower 6-7 cubes
Feeds doll
Object permanence after invisible displacement
24 months
3-4 word sentences
Speech is 75% understandable
Carries simple conversation
Repeats 3 digits
Broad jump
Throws ball
Draws circle
Understands taking turns
Dresses with help
3 years
Names 3-4 colors
Speech is 100% understandable
Names 3 objects
Defines 3 objects
Hops
Draws a cross
Plays cooperative games
Dresses without help
4 years
Defines five words
Repeats 4 digits forward
Walks stairs without using railing
Draws a triangle
Follows rules
Brushes teeth without help
Prepares cereal