Sara Stanley 
Pocket PAL: Creating Enquiring Minds [PDF ebook] 

Inspiring, intelligent and practical, this user-friendly guide provides a wonderful introduction to using P4C (Philosophy for Children) in primary schools. This extremely accessible book provides an introduction to philosophy for children. It explains how you can encourage children to ask the right questions, reason effectively, think for themselves, and begin to understand more about themselves and the world around them.
Inspiring and intelligent, with clearly presented, practice-based examples, it is full of fun and engaging activities that work right across the curriculum.