Two things.
Thing #1 is there’s a great write-up of some early impressions for LEGO Harry Potter: Years 1-4 over at Wired’s GameLife. Though it brings to the horizon the same ol’ notion that the LEGO videogames are really just for kids, and that the gameplay mechanics are not adhered to adults at all. Naturally, I disagree. Sure, a kid could play through some levels in LEGO Batman, but several puzzles might prove too challenging. I like to think of the LEGO games as the best of both worlds: fun (though not always funny) cutscenes, colorful characters and locations, easy-yet-addictive gameplay, and a perfect reason for offline co-op.
Thing #2 is a new trailer, which runs for one minute and thirty-nine seconds, of which seven seconds shows actual gameplay in the Potterverse. You can check it out below: