I've finally decided I'd like to start feeding the birds. My grandparents have a couple bird feeders on a line of string, and they attract not only birds, but squirrels, chipmunks, and hawks. I love seeing this little bubble of wildlife. What is the best bird feeder to keep out squirrels, but is also not a ton of money? What's the best all-purpose bird seed that will attract a wide range of birds? Does that even exist?