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3 months: Babbling & Mimicking
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8 months: Sitting up by himself
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9 months: Object Permanence develops
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9 months: Crawling
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9 months: Says "Mama"
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10 months: Waves goodbye
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11 months: Clapping
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1 year: Starts walking
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1 year: Understands "no"
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1 year: Holophrastic speech
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2 years old: Rides tricycle
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2 years: Telegraphic speech
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3 years: Understands his name
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4 years: Starts to form complete sentences
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4 years: Forms Independence & takes Responsibility for himself
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5 years: Counts to 10
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5 years: Starts writing
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6 years: Likes to play Pretend & Make-Believe
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6 years: Starts to read
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7 years: Starts joining Sports & Boy Scouts
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7 years: Develops drawing skills
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7 years: Learns how to swim
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7 years: Loses 1st baby tooth
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8 years: Able to throw and run accurately
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8 years: Rides a bicycle
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9 years: Starts going through puberty
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9 years: Compares two objects
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9 years Develops first crush
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10 years: Able to read novels
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10 years: Fine motor skills develops
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10 years: Loses majority of baby teeth