Why is the sea salty?
How far away is space?
Why can't I tickle myself?
Why can't we live forever?

Children ask the most interesting and challenging questions. But how are we supposed to answer them...?

At last! Expert answers to those big questions children ask, with help from:
Sir David Attenborough
Heston Blumenthal
Kate Humble
Alain de Botton
Philip Pullman
Dr Richard Dawkins
Bear Grylls
Dame Jacqueline Wilson
Jarvis Cocker
Dame Kelly Holmes
Noam Chomsky
Jessica Ennis
Derren Brown
Miranda Hart
Tracey Emin
Harry Hill
A C Grayling
Dr Christian Jessen
and many more!