The Purple Sluggy Worrywarts: Quentin Quirk's Magic Works

In desperate need of a talent for the local talent show, Jez and Charlie visit the Magical Emporium and set their sights on buying a Box of Tricks, believing it contains a variety of performing magic tricks. Instead, Mr. Quirk forces them to buy a jar of Worry Warts (slug-like hairy warts that suck worry out of people), but the boys get a hold of The Box of Tricks they think contains nothing but tricks. Will this box contain what they need or will more chaos and impending rescue ensue?