Our newest game is Magic Piano, the iPad app. The tone quality in this app is good, and even in the atonal clusters that Baby plays, it sounds rather pleasing. There is some fun and exciting visual feedback as well and baby has been experimenting a little more each day with different ways of touching/hitting the screen. It both fascinates him and excites him and is perfect for when he is getting fussy with boredom from his usual games.
Talking Tom Cat is another game that can be fascinating for babies and educational as well. The cat repeats everything you say in a higher pitch. Babies love high pitch voices, and this allows them to get a second chance to hear everything you say. Repetition is important for learning. When baby starts talking to the cat him/herself, the repetition can help build self awareness. Recording oneself and playing it back is a really valuable tool when trying to master a skill like playing an instrument. The same would be true of learning to talk. The cat makes it fun!