Your Cub Scout can also search the Elective trail. On the Wolf trail, the main sections were called achievements, things that we would like all boys to do. On the Elective trail, the main sections are called electives, choices that a boy can make on his own and with your guidance. Elective loops are presented at a pack meeting after he receives his Wolf badge.
Your son should begin earning achievements toward his Wolf badge as soon as he complete the Bobcat requirements. Completing electives generally should wait until after he has earned his Wolf badge. He might, however, find some electives that he could be completing before he earns the Wolf badge. Some of the activities in "Paws of Skill," might be examples. As long as he completes these electives after he has earned his Bobcat, you may credit him for them, but be sure to keep him focused on the achievements until he completes them.