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Infants coo - vowel like slounds
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Infants starts to babble, using consonants
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Establishes joint attention
Toddler say their first recognizable word -
Vocabulary expands to 50 to 200 to 250 words
Starts teegram speech, two word utterances -
Child is able to use words in the concrete form without visual references
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Expressives use of vocabulary words has increased to 2100 to 2200 words
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Approximately 2,600 words of expressive vocabulary and 20,000–24,000 words of receptive vocabulary
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Learning words up to 12 words a day, in some cases up to 20 words a day
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Children's vocabulary development through reading moves away from learning concrete words to learning abstract words.