Don't you know a sand-fairy when you see one? I dare say you have often thought about what you would do if you were granted three wishes. The five children - Cyril, Anthea, Robert, Jane and their baby brother - had often talked about it but when they are faced with the grumpy sand-fairy they find it difficult to make up their minds. And that is just the beginning of their dilemmas. As they discover, there is nothing quite like a wish for getting you into terrible trouble.