Long, long ago there was a poor girl called Polly who lived next to the beach . She had a strange little cottage with a rusty bike but she was happy . Early one morning , Polly went for a walk to collect shells . She collected flat shells , curved shells and thin shells . Suddenly, Polly found the most beautiful shell she had ever seen lying next to a rock pool ! Slowly, Polly bent down to pick up the shell which was glistening in the sun . To her amazement , the shell spoke . “ I will grant you two wishes so choose wisely ! ” said the magnificent shell .