Music lessons can get expensive, so a new piano is trying to offer them itself. A young company called The One is launching a campaign on Indiegogo this morning to bring its smart keyboards to the US. The first, The One Smart Piano, is an digital piano with 88 weighted keys; the other, The One Light Keyboard, is 61-key MIDI keyboard. Both keyboards integrate directly with an iPhone or an iPad — although the iPad's large screen works best — to teach you songs and present music lessons through a free app. The app has specific music lessons, but it also allows you to play learning games and download sheet music, for free if it's in the public domain or for about a dollar if it's from a modern artist.