My 6 year old has difficulty with his "s" sounds, they come out sounding like "th". Although it sounds adorable now I don't want him to have difficulty later on in school. Are there some fun, engaging exercises or activities you can recommend to help correct the lisp? Should I just wait to see if he grows out of it? I'm a bit afraid that if I bring attention to it I may discourage him from speaking or cause him to doubt himself. Thanks for the help and advice.