Frogwart said, "R's sound like R's. It's very easy to remember R's."

"You can hear them clearly in words that start with R like rainbow, rooster, rice and railroad."

"You can hear them in words that start with other letters like string, truck, wrinkle, crocodile and fruit."

"You can hear them in words that have r's in the middle like Kangaroo, and borrow."

"And you can surely hear r's at the end of words like star, bear, number, and door."