If your child is 3-5 and has trouble pronouncing words starting with these letters... R (race car) L (lunch) Th (think) it is okay!! It's developmentally appropriate and no help with speech is needed. --- For 3 to early 4 year olds, if they have trouble pronouncing: P G T D N W K G they need extra help with these sounds. Contact your local speech center. --- For children ages 4-7, pronouncing any of these beginning sounds: S (sun) Z (zipper) Sh (shell) Ch (cheese) J (jump) F (fun) V (van) inappropriately means they need extra practice. Contact your local speech center for information. Note: a lisp is okay, but substituting other letter sounds is not. For example, dipper instead of zipper; dun instead of sun... Use the cue system (download) with your child to help emphasize and remind them of these sounds to improve their articulation.