Boy Scouts will need a Travel Bug to complete requirement 8b for the Geocaching merit badge.
Geocaching merit badge requirement 8b: Create a Scouting-related Travel Bug ® that promotes one of the values of Scouting. “Release” your Travel Bug into a public geocache and, with your parent’s permission, monitor its progress at www.geocaching.com for 30 days. Keep a log, and share this with your counselor at the end of the 30-day period.
Each Travel Bug comes as a pair; One bug gets attached to an item (or on its own) and the other is a copy that you can hold on to. The Travel Bug tags has its own unique tracking number stamped on it. This tracking number is used as proof by the user that they found the item. It also doubles as a way for the user to locate the personal web page for the travel bug.