Anyone working in the emergency services has at least one story of a young child keeping calm and doing the right thing. Children take emergency advice very seriously, and remember it when the time comes.
These 25-page books provide the sort of advice that can save lives, and are well targeted to support readers in key stage 1. Each spread has a full-page picture and 70 to 100 words of information on the facing page In the Playgrounds book, particularly, teachers will look for advice on coping with ill-intentioned adults. There are two good pages on this. "If someone tries to touch you in a way that makes you feel uncomfortable, say 'No!' in a loud voice. Then run to a grown-up that you know and trust."
Rightly, though, the book is mainly about fun and friends.