Fuel childrens' natural curiosity with The Big Book of Knowledge - the ultimate reference guide for curious kids on their journey of discovery!From the animal kingdom to outer space, this beautiful hardback guide invites children to ask big questions about and think big thoughts. Readers can find out what makes a bicycle go, why it rains, how dolphins communicate, and much more, covering essential topics from science, mathematics, geography and ecology.Tricky ideas are set out in clear, easy-to-understand terms, with colourful and engaging illustrations that really help to clarify concepts. There are even six fun quizzes to put new knowledge to the test! A voyage of discovery for bright young things aged 5+.