Forget Guitar Hero. Become a Harp Hero! Arciem has released Harp (App Store, $1.99), an interactive harp for the iPhone and iTouch.
Use your left hand to pick chords, and your right hand to strum in a 4-octave range. Harp can be used for entertainment (put on a mini-concert for your friends) or education (become more familiar with chords and intervals). The colorful and simple GUI makes Harp especially appealing for the younger set or those who are just learning how to play music..
Listen to Harp play some classic childhood songs: