By maintaining and presenting a collection of related items (like stamps or coins), Cubs develop organizational and public speaking knowledge and skills. 
Collect and organize a group of objects of your choice and keep your collection for a period of at least three months. Some examples: coins, stamps, photos, books, comics, sports player cards, leaves, matchbox toys, etc.
Show and talk about your collection at a pack meeting.
- Taken from MEASURING SUCCESS - THE SCOUTING WAY