Ipod all the way!!
DS(4) has the 4G Nano and DD(10) has the 8G Nano. I can download their shows like Mickey's club House, Hannah Montana, and have all the music, and some movies on it too! It's fantastic. The screen is a great size, it's easy to use(my 4 yo taught me!LOL)and they sell rubber skins to protect it. We also put a screen protecter on theirs. They take them everywhere and it's so helpful for long car trips, on the plane, etc.... We have no problem downloading things from Itunes, it's really simple. We can even convert any movie we have to go in the Ipod too! They really take care of them and it's been worth every penny!