Flowkey - The easiest way to learn piano with your iPhone or iPad
Badanamu Alphabet Talk and Trace - Badanamu Alphabet Talk and Trace is an app that allows children from 0-7 to learn the alphabet.
Yousician - Learn to play music at home, at your own pace
ABC Kids - Fun, tracing and phonics app to teach kids the English alphabet.
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
MyABCs - An educational game for young children.