1 - first words
18 months - 2 word combos - noun, verb, adj
2 years - rapid growth of 2 word combos
3 - more complex - adv, pro, prep - play with sounds
4 - grammatically correct sentences, why & how
5 - 6000 words
Some children hear 1.4 million more than others if read to 5 times a day. Not read to equals
to 4000+ words by kindergarten.
Early language exposure affects the way language networks are built in the brain.
https://www.psychologytoday.com/us/blog/brain-waves/201705/the-magic-readin...