2 years: doesn’t use common tools, doesn’t use 2 word phrases
3 years: unclear speech, doesn’t have pretend play
4 years: trouble scribbling, not interested in interactive games, resists dressing, can’t recall story, doesn’t understand same and different, mixes up me and you
5 years: unusual emotions, withdrawn or not active, easily distracted, trouble focusing, trouble with recall, can’t engage in self help skills