ICaroler is a really cute app that shows little cartoon people singing a few popular Christmas carols. You can tap on the figures to mute them, move them around or just enjoy the song. You can also carol with fellow iPhone friends. I didn't have time to do this but did find a video of someone did do it.
For 99 cents, I thought it was cute but nothing to really go nuts over, but then I handed it to my two girls (8 and 11). They absolutely love this thing! They aren't networking but they love figuring out the different chorale parts--muting some,moving the characters around. And Santa even flies by every now and then--they go crazy when that happens.
As a matter a fact, I handed them the iPhone after homeschool work to see what they would do. They giggled and sang and giggled more for a good hour! A quote from Miley (11), "this is the coolest thing ever!". Now that is totally worth 99 cents!
You can find the app by clicking here.