3 domains:
6 weeks - Startled by sudden noises
3-6 months - babbling
9 months - understands No, bye bye, own name
12 months - understand a few words with meanings
18 months - 6-10 words
2 years - Follows 2 step commands, put 2 words together
3 years - 3-4 word sentences, start to tell stories and ask questions
4 years - count to 10, identify colours
Causes of delay:
Red flags: