Enid Blyton - Happy Days Series - Mr. Pinl-Whistle Has Some Fun

Mr Pink-Whistle uses his magical abilities to become invisible, to bring a teddy bear to life, to turn marbles into balloons, and to stop cruel children stealing from others. Determined to change the mean boys for good, Mr Pink-Whistle punishes them in a way that they will never be able to forget. His ideas seem to be limitless, but will he be able to correct the worst of them?