Cub Scouts (and everyone else in the Scout family) shake hands with their left hand. Why do they do this?
The tradition was started by Lord Robert Baden-Powell. When he was a soldier in Africa, he saw lots of tribal chiefs who carried spears and shields. He noticed that it was a sign of great trust to offer your left hand when shaking hands. This was because you had to put down your shield, and leave the other person holding their spear.