They are expecting a magician: The Great Supremo. He can't abide dirt or incompetence and loves cakes. Scampi uses his special vacuum cleaner and blows dirt everywhere. Liana and Sweep make a cake and Sweep uses the magic wand to stir it . Richard practises his trick- and gets covered in gunge. The Great Supremo arrives in the midst of this and is appalled. He eats the cake and floats up to the ceiling. It is delicious - the wand has made the cake magic. The Great Supremo is amazed when Sooty magics everything clean again.