1. Stamp collection/ be/ interesting hobby.

⇒Stamp collecting is an interesting hobby.
2. You/ can learn many things, such/ the geography/ a country/ stamps.

⇒You can learn many things, such as the geography of a country from stamps.
3. Postal stamps/ be a source/ interesting facts/ important dates/ every country/ the world.

⇒Postal stamps are a source of interesting facts and important dates about every country in the world.
4. It/ make stamp collecting/ become very popular.

⇒It makes stamp collecting become very popular. 
5. As you look at the pages/ a stamp album, you/ can learn interesting details/ foreign customs/ arts/ literature/ history/ culture.

⇒As you look at the pages of a stamp album, you can learn interesting details of foreign customs, arts, literature, history and culture.
6. Their colors/ can make/ you feel relaxed/ happy.

⇒Their colours can make you feel relaxed and happy
7. Collecting stamps/ can become/ a business.

⇒Collecting stamps can become a business. 
8. If you are lucky/ finding/ special stamp, it/ will bring/ you some money besides
knowledge/ pleasure.

⇒If you are lucky in finding a special stamp, it will bring you some money besides knowledge and pleasure.