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At .5 months, the infant extends legs and feet when soles are touched
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At about 1 month, infants move their mouths towards any objects placed near their face such as the nipple
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At about 1.5 months, infants will fan out toes on feet when their soles are stroked or massaged
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At the age of 2 months, infants begin raising their heads to 45 degrees while laying on their stomachs
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At around 2 months, infants develop plantar grasp (grasps objects in palms like a finger or anything small object placed near palms)
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At around 2.8 months of age, infants develop the ability to roll from their front or belly to their backs
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When an infant reaches 2 to 3 months, it makes basic gurgling sounds in response to others, especially when left alone or with mother
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Infants around 3 months are cabable of switching attention between two objects; attracted to colors like black, white, yellow, and red; begins associating visual stimuli with events or actions such as bottle with feeding
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With support from an adult or other implements, infants are able to sit upright after 4 months
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At around 3 months, infants begin forming noises as they babble communicating with sounds rather than words such as "ba, ba, ba"
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Around five and a half months, infants possess the ability to sit by themselves without support from adults or other means
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(5 to 6 months) Infant has achieved eye-hand coordination; examines objects within hands; visually explores and scans the environment
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When infants reach 6 months they use his/her voice to display pleasure or displeasure; recognizes voices and tones; notices speech/sounds from toys and music; begins using babbling in recognizable words like "da da, ma ma, etc"
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(6 to 9 months) Moves objects from hand to hand; examines objects thoroughly; focuses on activity in environment and surroundings rather than simply stationary objects
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When the infant reaches about 7.6 months of age, they are able to pull themselves to a standing position using objects such as chairs or tables
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At the age of 9.2 months, infants can walk while holding on to objects such as furniture and other means of aid
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Infants between 9 months and 1 year can spot small objects; become motivated by the sight of certain objects; become excited at the sight of new people, objects, or environments
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When an infant reaches 10 months, it wil be able to move around unassisted by crawling and creeping on the ground or floor
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At about 11.5 months, infants or babies can stand by themselves without aid from adults or other ways which will later lead to the ability to walk unassisted just past age 1
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At around 12 months, infants begin imitating words; understands "no"; follows simple instructions like "drink your milk"