Lego Harry Potter In the Defense Against the Dark Arts classroom, students experience strange creatures and other unusual things. Lego Harry Potter Is Neville's Riddikulus charm strong enough to transform the menacing Boggart Snape into his grandmother's clothes? Turn the wardrobe and find out. Lego Harry Potter Go upstairs to visit Professor Lupin in his office. Building set includes 155 Lego Harry Potter pieces Lego Harry Potter.