Consider labelling picture books with a ‘recommended for P4C’ label. This will help colleagues easily find a suitable stimulus for their class.
You can also support further by adding some big ideas / concepts on sticky notes on the inside cover.

More about Philosophy for Children
Are these examples of adventure, bravery, or both?
Lawrence the Lion and Maple the Meerkat tackle some philosophical dilemmas…
An example of using children’s wonderings to guide a philosophical discussion
Get your class thinking about fairness, teamwork, competition and more
Ways to keep everyone engaged and develop the community of enquiry
A detailed description including building, helping, sharing and working together
How to start a question, and think about whether or not it’s philosophical