Spotted this thread and had to reply cos I just took dd fot 3.5 yr visit to maternal child health nurse & asked similar question. She showed me diagram of when kids learn to say certain sounds. Ability to say 'L' only develops from 3.5- 4.5 yrs of age. Eg so kids often say 'lellow' instead of 'yellow'. My dd says 'yets go'! 'TH' is a sound learnt between 5- 8 yrs old! Interesting hey? Hope this helps u.

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