Descriere

• Publisher ‏ : ‎ Readers Digest; 
• Language ‏ : ‎ English
• Author: Neil Ardley
• Reading age ‏ : ‎ 9 – 12 years

Identifies the scientific principles behind a variety of everyday objects while providing a range of informative and easy-to perform experiments, and highlights such items as a battery, a bar-code reader, and a disk drive. 40,000 first printing.