You don't need to worry about getting sued by the Recording Industry Assocation of America or arrested by the FBI if you download legal music. Many independent and unsigned musicians offer downloads of their music in hopes of attracting more fans. Here's some music from my friends Oliver Brown and Rick Walker's Loop.pooL as well as my own piano compositions.
"Music Quizzes, Games, Practice Pianos and Help Pages by Ms. Garrett
Scroll down the page to play over 130 elementary quizzes, puzzles and games about music. Music Information and Theory pages below will help you learn the names of music notes, rhythms, terms and the names of famous musicians and composers. I have posted a list of the programs that I used to create the quizzes at the bottom of this page."