Rolling the RRRRR

 I can manage the single R just fine. It's pronounced like the English letter d. But the double r is beyond me.

A friend from Guatemala, who taught young children, tried to get me to learn it. She said, "We have to teach the children how to pronounce it correctly. They don't get it naturally. We all have to be taught."

Of course, I wanted to know the method. Maybe it would work for me!

She explained: "We have them move their arm in a circle, like a car starting its engine, while saying 'rrrrr' like a car starting up, only trill the tongue in the double r sound."

I tried it, and it does work. I trilled my tongue while moving my arm in the circular motion, as one would do to illustrate an engine starting. Whenever I want to make the double r sound, I just move my arm and trill my tongue. Rrrrrrrr.

Except I can't get it any other way. I just can't seem to trill my tongue without also moving my arm like a 5-year-old starting his imaginary car.