Letters, Postcards and Packages all have stamps. Every country has stamps. You can ask your mom or dad to save you stamps. Sometimes a neighborhood business will save them for you.
Some people save stamps from one country like the USA or France or even Canada.
Other people save stamps that have Horses on them or buildings or cars. You can make the collection anything you want it to be. Definitive stamps are the every day stamps you see. They come in denominations from 1 cent to more than 14 dollars. They usually have pictures of Presidents or famous people.