In 2007, Scouts all over the world celebrated the 100th anniversary of the Scouting movement.
There were all sorts of events and activities taking place throughout the year, but the highlight was the 21st World Scout Jamboree.
The 12-day celebration was in Chelmsford in the UK and was based on the theme One World, One Promise.
The idea of the Jamboree was for people to be able to share adventure and international friendship.
About 40,000 people from around the world were involved in the Jamboree.
The very first jamboree was held at Olympia, London, in 1920 and organised by Sir Robert Baden-Powell, who started the Scouting movement back in 1907.