Developmental Milestones

Age	Milestone (s)
4 months	Lift head and chests when place in prone Watches hands, put objects in mouth (sense of self) Recognize bottles & mother or other familiar faces (smile, reach, laugh, squirm) Start to recognize sounds and makes minimal verbal functions (gurgling, babbling, cooing)
8 months	Sit alone Assist into standing position by pulling on chair or crib Reach for objects and pick them up Crawling efforts Bangs toys together Pass objects from hand to hand Imitate arm movements (splashing, shaking rattle, crumpling paper) Feed self and munch instead of suck Imitate facial expressions and gestures (wave bye-bye) Frequent babbling w/ imitation of sounds (may say mama and dada but don’t know the meaing of words)
1 year	Crawl well and need support to walk Stand alone w/o support Open drawers and pull cords Touch objects frequently to explore them Put toys in and out of containers Drink from cup; use spoon Cooperative while being dressed Regularity of bowel and bladder control Enjoy audience and will repeat behaviors that others laugh at and draw attention through squealing or making noises Understand some commands Express choices about food and bedtime Meaningfully use some words (like mama and dada)
18 months	Walking and attempts to run Walk up stairs with holding hands Push large objects and pull toys Scribble with crayons Build blocks (usually only up to 3 or 4 blocks) Move objects from place to place Can imitate turning pages and other simple actions Hold own glasses with both hands Fasten zippers by self and remove socks and hates Toilet training – can tell parents when they are wet Play alone even though they enjoy having other children around 3-50 words referring to ppl, objects, activities Use babbling to have conversations with adults Understand commands (Give kisses; Do you want this?)
2 years	Walk and run well Balance briefly on one foot Throw ball in overhead Use stairs by self (one step at a time) String large beads Stack 6-7 blocks Explore texture and materials like sand, water, clay Imitate adults in cooking or cleaning Name common pictures Listen to and follow directions Assist in dressing by attempting to button clothes Wash hands Small glass can be held with one hand Typical daytime control of bowel and bladder movements but not nighttime Play alongside others More aware of feelings and reactions of adult – seek approval Show emotions Say no a lot 2 or 3 words together to express an idea (mama in there) 50+ words Repeat books over and over Identify common facial features ‘What’s this?’ in excess
3 years	Walk and run at steady gait Stop quickly Turn corners w/o falling Up and down stairs with alternating feet Ride tricycle Swing, climb, sliding Develop imagination (use objects in play to represent a variety of things) Imitate others’ activities Cut with scissors Controlled markings with crayons Help in dressing: put on items (pants/sweater); may be backwards or inside out Button and unbutton own clothes Begin to use fork Get own glass from faucet or pour liquid from a small pitcher Wash hands and face Use toilet; accidents are rare Eager to please adults Can be reasoned with Notice what other children are doing Start cooperation by taking turns Use sentences that are longer Plurals and personal pronouns are used
4 years	Running, skipping, jumping, stunts Race up and down stairs Carry liquid w/o spilling Even more creative and imaginative Use clay, sand, blocks, custumes Simple drawings Cut or trace along a line fairly well Assertive Dress self – buttons, zippers, put on shoes (no tying) Set table Can usually sleep through night w/o any toilet accidents Separation from parents – less cooperative with directions Prefer playing with children Talkative – ‘what’ ‘why’ ‘ how’ Name calling Brag and boast Tendency to misuse words Difficulty with grammer Tell stories
5 years	Activities tend to be more complicated and directed toward goals Roller skates, jump rope, skip More recognizable drawings Hide & seek, tag, hopscotch (more complex) Singing, dancing, music Dress and undress, help with tying shoes Cooperate with others Acknowledge rights of others and respond to adult supervision Conform to rules Enjoy family activities More complicated sentence structure and accurate More interested in books and words Count Colors Attempt at writing
6-8 years	Balances well Choose challenging activities (which may scare parents) that increase motor skills Active play (kickball, stunts) Interest in simple games (marbles, collecting items) Play with dolls Acts as animals or other people Go to bed alone Get up by self at night to go to the bathroom Go to school or friends’ homes alone Interested in social situations Play with peer group Use social skills Sensitive to reactions around them – especially parents React negatively to pressure or criticism Better pronunciation and grammer Put thoughts and feelings into words Begin to understand some jokes Develop reading and writing skills
9-11 years	Posture, balance, extreme motor skills End of games Separate gender groups More independent Wants to experience new things Focus on detail More peer oriented; friends very important Answer questions with insight Understand more abstract concepts

At this point, I really don't know how I'm going to remember most of these. I can get the up to the 2 year old b/c I have an example in my own life of about that age range. But after that, things just get tricky. It is important to note, however, that development is continuous. Also, a child may be progressing rapidly in one of the areas of development (Motor, Play, Adaption, Social, Language), and be slightly behind in another area.

Reference:
Zastrow, C.H. & Kirst-Ashman, K.K. (2004). Understanding Human Behavior. Thomson Learning, Inc., Belmont, CA. p. 59-65.