The R sound is typically one of the last sounds to be mastered by children, often not maturing until ages 6 or 7.

When should r sound be mastered?

Many children can say a correct “R” sound by the time they are five and a half years old, but some do not produce it until they are seven years old. In general, if your child is not producing the “R” sound by the first grade, you should consult with a Speech-Language Pathologist (SLP).

When should a child Master R blends?

Children usually learn /r/ blends between the ages of 3 - 8 or 9 years old. /s/ Sounds: like /r/, vocalic /s/ is easier than /s/ blends. So the word 'sit' will likely be easier to say than the word 'smell'.