1950s
BSA membership rose dramatically between 1950 and 1960, from 2.8 million to 5.2 million. The 40th anniversary celebrated the theme of "Strengthen the Arm of Liberty." As part of the theme, the BSA distributed over 200 replicas of the Statue of Liberty. The 8-foot-4-inch (2.54 m) copper statues are known as the "Little Sisters of Liberty".
The first pinewood derby was held in 1953, becoming an official part of the program in 1955. In 1954, the Webelos den program was started for 10-½ year olds and a Webelos den emblem was introduced, used on the Webelos den flag and replacing the den number on the uniform. The Bobcat pin was approved for uniform wear in 1959. In 1956, Scouts and Scouters who participated in an approved international activity or event were allowed to wear the World Crest as a permanent award. Local councils were allowed to present the crest in 1957.
In 1959, the Boy Scout Handbook's dimensions increased to their present size and it was printed in full color for the first time. Cub Scouts and Boy Scouts lowered their age limits, and Exploring was extensively modified to include vocational exploration.
Read more about this topic: History Of The Boy Scouts Of America