My ds is due to start school this sept. He's 4 in August. He's always been very friendly and confident with adults and as yet we haven't tackled the issue of strangers with him. Partly because we don't want him to lose his innocence I guess, partly because he's also quite a sensitive little fellow and I don't want to scare him. But we probably do need to raise this with him now, esp before he starts school. Has anyone got any thoughts on how to do this sensitively and maybe are there any books out there (fiction for little ones I mean) that might help?