age one month  
Raises head slightly off floor or bed when lying on stomach.
Holds head up momentarily when supported
Briefly watches and follows object with eyes
Avoids mildly annoying sensations (placement of cloth on face)
Some "Noise in Throat" sounds
age two months birth to six months
Hold head erect, bobbing, when supported in sitting position
Follows moving person with eyes
Imitates or responds to smiling person with occasional smile
Vocalizes
I smile
I look at faces

I listen to voices or noises
I lift my head when I’m on my tummy
I follow moving objects with my eyes
I hold a rattle or toy
I babble or coo
I roll over
I pull to sitting holding someone’s fingers
I recognize and reach for Mommy
age three months  
Lifts head and chest when lying on stomach
Vigorous body movement
Head control is improving
Recognizes breast or bottle
Coos-Chuckles
age four months six months to one year
Good head control
Rolls from side to side
Takes object, such as a rattle, held near hand
May begin reaching
Follows moving object when held in sitting position
Laughs aloud
Enjoys play
I sit alone
I say "Mama" or "Dada"
I crawl
I clap my hands
I recognize familiar words
I copy speech sounds
I pull myself to stand
I use my fingers to eat some foods
I understand "No"
I take steps with help
I say "peek-a-boo"
age six months  
Sits with minimal support
Rolls from back to stomach
Transfers object from hand to hand and from hand to mouth
Babbles-more than two sounds
age nine months one year to eighteen months
Sits alone
Changes position without falling
Plays with 2 objects at the same time
Unwraps block
Says Mama-Baba
I walk alone
I say several words
I try to feed myself with a spoon
I stack 2 or more blocks
I follow simple directions such as "bring your shoes"
I scribble on paper
I run and jump
I turn pages in a book
I point to 3-5 pictures in a book
   
  eighteen months to two years
I put 2-3 words together
I pedal my tricycle
I balance on one foot
I begin to use the toilet or potty
I like to be "the boss"
I ask a lot of questions
I jump with both feet
I tell you how I feel (sad, mad)
I climb the stairs
I copy circles or lines
I understand "In", "On", "Out."