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1 Month Old keep hands fisted or slightly open
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3 Months old grasps and keep shakes hand toy
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4 Months begins to use mitten grasp for grabbing objects near the hands
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4 Months swipes at objects, gradually improving aim
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5 Months can sit supported for 15 to 30 minutes with a firm back
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6 Months gets up on hands and knees, but then may fall forward
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7 Months hold an object in each hand
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8 Months learns pincer grasp, using just the thumb and forefinger
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9 Months sits alone
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9 Months uses index finger to point, lead, and poke
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10 Month climbs on chairs and other furniture
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10 Month likes to walk holding caregiver's hands
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11 Month is able to stand and pick up objects
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11 Month takes off shoes and socks
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12 Month climbs up and down stairs
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12 Month may be able to pull off clothing
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1 Month prefers to look at human faces
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3 Month laugh out loud
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4 Months enjoy watching hands and feet
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4 Months smiles and coos when caregiver talks to him or her
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5 Month babbles to initiate contact
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6 Months grabs at any objects in reach
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7 Months may be able to play peek-a-boo game
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8 Months searches for a hidden object
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9 Months finds objects that are totally hidden
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9 Months responds appropriately to a few specific words
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10 Months speaks recognizable word
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10 Months waves good-bye
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11Momths old likes to open containers and look at their contents
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11 Months puts nesting toys together correctly
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12 Months links specific acts or events to other events
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12 Months likes to look at pictures in a book
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1 months old reacts to discomfort and pain by crying for assistance
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2 months shows affection by looking at a person while kicking, waving arms, and smiling
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2 months old is able to show distress , exctiment , contetment , anger , and delight
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3 months old watches adults' facial expressions closely
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4 months old responds to continued warmth and affection
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4 months old laughs when tickled
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4 months shows increased pleasure in social interactions
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4 months old enjoys social aspects of feeding time
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5 months old may begin to show fearful behavior as separateness is felt
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6 months old likes attention and may cry to get it
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6 months old laughs when socializing
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6 months old enjoys playing with children
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7 months old thoroughly enjoys company of siblings
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7 months old expresses anger more dramatically
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8 months old values quick display of love and support from caregiver
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8 months old enjoys playing with own image in a mirror
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9 months old may show a fear of new sounds
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9 months old shows interest in play activities of others
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9 months old likes to play games like pat-a-cake
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9 months old recognizes the social nature of mealtimes
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10 months old performs for others, repeats act if applauded
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10 months old enjoys music and may mimic movements others make to music
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10 months old fears strange places
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10 months old cries less often
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11 months old tests caregivers to determine limits
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11 months old imitates movements of other adults and children
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11 months old objects to having his or her enjoyable play stopped
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11 months old may not always want to be cooperative
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12 months old shows increased negativism. May have tantrums
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12 months old likes to practice communication with adults
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12 months old enjoys playing with siblings
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12 months old may resist napping