Klutz 6 pack. Master the real science behind electricity and have a blast doing it. Includes a genuine Klutz alkaline battery, a buzzer, a propeller, a light bulb, a motor and other useful doodads - everything you need for all eight projects. Toss in a little history, and you've got an activity book so good, it's shocking. 'Battery Science' was the winner of the 2004 Parents' Choice Recommended Award, and is in Dr. Toy's 10 Best Educational Products and 100 Best Children's Products.