This book comes with an interactive CD. A ‘known-to-unknown’ approach has been followed in developing the concepts using the experimental method. The new HOTS (Higher Order Thinking Skills) questions section will greatly enhance the development of independent thinking skills. ‘My Virtual Library’ section lists websites from where children can get more information. ‘In the Laboratory’ motivates children to work on experiments and projects along with Science Virtual Resource Centre www.science.ratnasagar.co.in