research or experience with 5-7 year old children using iPods?

I am looking for either existing research, or first hand experience around
how usable the iPod interface is for 5 to 7 year old children.

I'm particularly interested in how well kids can navigate video playlists on
the video iPod, but any information or work done with kids and iPods would
interest me.

Thank you,

--David VanEsselstyn