Once upon a time, there was a poor old fisherman. One day he caught a tiny little lobster. The lobster asked the fisherman, "Mr. fisherman, can you let me go and I will come back when I get fatter?" Because the lobster seemed so desperate, the fisherman let it go. A few days later he caught the same lobster. That day the lobster said, "Mr. fisherman, if you let me go one more time, I will bring my friends next time." The fisherman believed the lobster and set it off. Just like it said, the lobster was back the next day. The fisher man caught some more. Finally the lobster said, "Mr. fisherman, now sell us and become rich." The fisherman sold the lobsters and lived happily ever after. 
If you help others, they will help you. 