Do you use iPad apps to teach your kids music?

I am just wondering if any of you use iPad to teach your children music. I am clueless when it comes to music but I really want to teach my son about music. He is 2.2 years old and I am not sure if he is ready for a software like Piani Wizard.

I just downloaded TrebleKids app and will show it to my son tomorrow. i know the apps things are not perfect ways to teach my son music but I just hope that he will have fun learning or playing with.

Do you know of other good music education apps?

Thanks,

Elle