Piano lessons usually come from elderly women who don’t approve of your playing, no matter how good you’ve gotten. If you want to learn piano without hearing about how terrible your technique is, the PianoMaestro can help. This device plugs right into your computer, and once you load up a song, it will show you how to play it by shining a light above the key you need to hit when you need to hit it. You can even slow down the instructions, or focus on either the right or left hand if you like. The best part is that you won’t have to pay PianoMaestro $50 per hour to teach you!