1. Stamp collecting and coin collecting are parallel hobbies.

2. His interest in coin collecting dates from his childhood.

3. My favorite hobby is coin collecting.

4. His father takes a liking to coin collecting.

5. Are you fond of coin collecting?

6. Coin collecting experts say they have identified a 210-year-old silver dollar that is likely the first one coined by the United States Mint.

7. Coin collecting is interesting, but you find a real valuable coin only once in a blue moon.