Ahh, geez. Can someone please give that kid something to play with? All these kids really want these days is a chance to creatively express themselves, right? Give them what they want: an iPad with musical instruments. On the flip side, those free instrument apps aren't just for kids who needs to keep their hands busy. There are a few that help us adults without idle hands actually put together a little tune, or learn to play an instrument. Here's a look at a few free music apps to either keep the kids busy or keep your mind in tune. See what I did there? (Maybe that pun didn't really work. Can't say I didn't try.)