Son: What do you do?

Dad: I am looking after the fish.

Son: Can you tell me more about it?

Dad: Umm … first you must feed the fish every day, but you mustn't ' t feed too much food.

Son: Do you have to change the water every day?

Dad: No, you don ' t. You should change the water once a week. And you must be careful with the water temperature. It mustn't ' t be too cold or too hot.

Son: Dad, can I look after your fish for one?

Dad: Yes. It ' s easy but fun.