Object:
a battery tester (normally comes with the purchase of new batteries and is located on the back of the package) and some batteries, some good and some bad
Good morning, boys and girls. How many of you know what a battery is? (let them answer) Very good! We need them in flashlights, computer games, lots of toys, and many other things. Have you ever tried to use a flashlight or a radio and it would not work? (let them answer) What happened? (let them answer) That's right, the battery died. And then what do you do? (let them answer) That's right, you find a new battery. But sometimes there is more than one battery used in a flashlight or radio and we need to know which battery is good and which one is bad.