1-3 months
Crying
Cooing and other vocalization
4-5 months
simple vowel sounds, laughs and raspberries
responds to name
4-7 months
squealing and yelling
mamama dadada without meaning
9-12 months
mama, dada, with meaning
3-5 words
No audible sounds by 12 months
Prob means they aren’t hearing anything
3 years
Over 400 words
3-4 word phrases
about half words understood by those outside family
4 years
speaks in complete sentences
75% of speech understood by outside family
5 years
everyone can understand all speech
can count to 10
say name and address