I babysit a 3yo girl who doesn't use an initial S sound. She does say the S sound in the middle and at the end of words, but NEVER in the beginning. "School" is "Cool," "story" is "tory," etc.
It's been that way for about a year, I would estimate.
So what is the remediation for that? I would think it'd be more than "time and development," but I don't know.
Any experience or knowledge about this speech issue?