My DS is only 3 & a half and I'm sure it's too early, but ... when should I start correcting his speech? Eg. He says "vere" instead of "there", "fink" instead of "think". It only concerns me because his Dad still speaks like that at age 37 because no one ever bothered to correct him. He's a very intelligent, articulate man but this speech impediment (for want of a better term) makes him sound a bit thick in my opinion. I don't want DS following in his Dad's footsteps, I want him to pronounce words properly as I believe kids need all the help they can get in society these days. Is 3 too young for me to start explaining to him about pronunciation?