My autistic son loves music. One afternoon, when he was nine, I downloaded GarageBand to his iPhone to help with the boredom of a long wait at a doctor's office. Instead of pacing or escalating into a meltdown, he spent the entire hour and a half practicing, learning, and composing. When we finally left that day, the rest of us exhausted and irritated, he shared his first composition with a big smile.
When you make an awesome song or beat that you're proud of in GarageBand for iOS, one way to show it off is to turn it into a ringtone or alert tone for your iPhone. That way, anytime you get a phone call or a notification, your musical creation will sound off, and everyone around you will hear it in all its glory. Plus, it's way cheaper to make your tones than to buy them off of iTunes.