Once a cub has reached the age of 10 he or she needs to start preparing to move from being a cub to a scout, should they be interested in continuing along their scouting journey.
One of the ways of ensuring that each cub has a smooth transition from cubs to scouts is to have them complete the Link Badge. This could take the form of a process over several weeks or a Link Badge camp. You will only work on the Link Badge during your last two months in the Pack, and wear the badge on your scout uniform until you pass your first Advancement Badge as a scout.
The Pack Scouter should work through all of the requirements with the cub alongside the Troop Scouter and Patrol Leader of the patrol the cub will join.
Take a look at the requirements for the Link Badge!