This book has been written to give a clear scientific understanding to children. The stories have been created to explain the scientific basis of natural phenomena rather than believing in unproven myths. Efforts have also been made to generate a love for nature, and animals and a zeal for environmental protection. The book is also my sincere tribute to Great scientists like Thomas Edison, Michael Faraday, Dr. Edward Jenner, Dr. Alexander Fleming who all worked very hard to invent useful devices, machine, and medicine that make my life more comfortable and secure. This book will act as a catalyst for the healthy development of children in all respects.