Lego Harry Potter: Chamber Of Secrets This is an extraordinarily detailed LEGO set, with almost 600 pieces that form four related Harry Potter scenes Though the finished product makes for a fun play world--with intricate castle chambers and a whole host of Potter characters This is really more like a 3-D puzzle than a toy For younger kids who don't have the patience to wade through the novella-length instruction booklet, the set may end up in a big, hopeless muddle