Use your LEGO collection to create the biggest, best and most magical Hogwarts Castle you can imagine. Three favorites will be chosen by a very special panel of judges - none other than Emma Watson (Hermione Granger), Rupert Grint (Ron Weasley), and Daniel Radcliffe (Harry Potter, himself!).
Prizes include a 15" Harry Potter model not available in stores, as well as LEGO Hogwarts Castle sets.
The article also includes a Top Ten list of reasons Dementors can't build with LEGOs.