The solar system Book for childrens 6-8 yearsYour child need to know about the solar system where we live. Childrens are very clever and their grasping power is also awesome. It is better to teach your child about some things early. Solar system a book by Harper collins is a great book for children of age group of 6-8 years. The book is filled with the graphics and language is also simple. The book is also very cheap only for Rs. 80 /-.