Scouts' Christmas post raises money
17 December 2011 Last updated at 09:17 GMT
Everyone is used to the idea of scouts doing their bit.
But perhaps not everybody is aware that in many areas of the country scout groups use this weekend to provide an alternative postal service for Christmas.
Thousands of them brave the elements to deliver millions of cards.
The BBC's Susannah Streeter has been to see how it works in Somerset.