The Jamboree Badge was designed by Levi Molineux, Scoutmaster for the 11th Hawthorn Troop. The kangaroo and the boomerang are both Australian icons.
The kangaroo, which can only move forward, symbolises progression in life.
The boomerang, when thrown, circles, gains momentum and comes back to the thrower. The World Chief perceived that friendship given out to others is returned in a similar manner.