When you're a young sorcerer-in-training,Lego Harry Potter homework takes on a whole new significance. So when characters out of the imagination of bestselling author J.K. Rowling decide to stage the ultimate Spell-ing Bee in LEGOland, no doubt the floo powder leads them to LEGO kit number 4702, The Final Challenge. Designed for Harry Potter fans, this 60-piece book/movie tie-in is heavier on the classic LEGO interlocking construction than other sets in the Harry Potter series, but still features such novelties as a spider web catapult and orange plastic torch "flames." Complete with a 16-page full-color instruction booklet, LEGO makes this Challenge a snap. --Tony Mason