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Birth
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13-15 Months: Physical
- May stand alone without support for a short time.
- Takes steps while holding onto parents' hands.
- Can sit in small chair for a short time.
- May climb out of crib, high chair, or stroller.
- Has improved grasping skills.
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13-15 Months: Cognitive
- Notices actions of other children and adults. Loves mimic all actions.
- Explores different features of objects as if studying them.
- Has very short memory and almost no forethought.
- Slowly increases vocabulary to four to six words.
- May use sounds to indicate specific objects.
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16-18 Months: Physical
- May be able to walk sideways.
- Stands on either foot with support.
- Pushes and pulls large toys around the floor.
- May show hand preference in all activities.
- Adds hand gestures to spoken language.
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16-18 Months: Cognitive
- Gradually refines concepts.
- Remembers where objects belong.
- Begins to figure things out through thought process.
- Vocabulary increases to six to ten words.
- Uses words instead of gestures to express some wants, such as "up" or "cookies."
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19-21 Months: Physical
- Walks sideways and backwards.
- Walks up and down stairs with help.
- Responds rhythmically to music with whole body.
- Holds two objects in hand easily.
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19-21 Months: Cognitive
- Processes from simple imitation to imaginative play.
- Can remember familiar objects without seeing them.
- Can obtain familiar objects from different room when asked.
- Has vocabulary of about 20 words.
- Enjoys labeling objects and parts of body.
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22-24 Months: Physical
- Walks with more coordination and assurance.
- Bounces and sways in simple dancing movements.
- Lacks ability to start efficiently or stop quickly while running.
- Shows increased coordination and smoother hand and finger movements.
- Can put several blocks together to make a train or stack them to build a tower.
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22-24 Months: Cognitive
- Becomes interested in the outcome of activities rather than just the activities themselves.
- Becomes interested in the precise placement of objects; enjoys form boards and simple puzzles.
- Is curious about objects in environment; feels, squeezes, pulls and pushes objects.
- Has vocabulary of 50 or more words.
- Is able to ask for things using simple words.
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24-30 Months: Physical
- Improves motor skills as torso lengthens and baby fat begins to disappear.
- Enjoys running but is unable to measure sudden stops. May collide with other people or obstacles.
- Climbs everywhere indoors, even in forbidden places.
- Opens doors by turning knobs.
- Can remove wrapping from gum and candy.
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24-30 Months: Cognitive
- Becomes increasingly interested in children's TV shows.
- Understands cause and effect in terms of own behavior.
- Is better able to plan a play activity and carry it out.
- Vocabulary starts at 200 words and increases to 500 or more in this period.
- Refers to self by name; then learns to use pronouns.
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30-36 Months: Physical
- Likes to be in constant motion, running or walking sideways or backward.
- Enjoys games involving running.
- Goes up stairs by alternating feet, but goes down one foot at a time.
- Turns doorknobs with greater strength.
- Scribbles and draws circles as well as horizontal and vertical lines.
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30-36 Months: Cognitive
- Begins to classify objects into general categories.
- Uses symbolic representation in make-believe play.
- Tries new play activities to discover more about how things work.
- Vocabulary starts at about 500 words and increases to 900 or 1000 in this period.
- Creates two- to three- word sentences, including verbs.