Video: Kids keep whistling language alive
11 January 2013 Last updated at 12:16 GMT
Children on a Spanish island are keeping an ancient whistling language alive.
Silbo gomero is a whistled version of Spanish which can be heard up to two miles away!
Before phones and roads were invented, whistling was a way the islanders could communicate through the valleys of the Canary Island of La Gomera.
But the whistling language is still going strong, thanks to lessons at a local school.