The King Of Tiny Things Book by Jeanne Willis and Gwen Millward

When two little girls visit their grandparents, it seems like a brilliant idea to camp outside for the night. But then the dark comes and it doesn't seem such a good idea after all! Until a most unexpected visitor arrives - the King of Tiny Things. He is the shepherd of creepy crawlies, bugs and grubs and shows the girls that, in fact, the night is bright with magic.