Foreign Currency Collecting coins from other countries can be fun and challenging for kids who want world coins from different countries to rare coin collecting from exotic places like rare and antique Roman coins or ancient Chinese coins. It can be very difficult to find the value of foreign coins in part due to the difficulty in foreign coin identification. Closer to home, coins and paper money of Canada have been issued over the years with special commemorative coin sets being some of the most collectible. With coin collecting in Canada on the rise, so has Canadian coin values, especially rare Canadian coins and valuable Canadian silver dollars.