Imagine you are a brilliant toy maker. You are the best in the country. Everyone comes to you when they want a new toy. You have just started designing a new doll. It will be battery operated, but only one AA battery will be used for a whole year. You have made her laugh, smile, and now you are making it cry. You press a button, she cried! The problem is, she just wouldn't stop crying! You are really upset. Christmas is fast approaching, and you will make heaps of money if you could make it in time. Noooooo!