Call for music!

My cousin Sonja found herself suddenly in the hospital this weekend, awaiting surgery. As of this morning, she's reportedly in good spirits and bored out of her mind. Since I can't just run down to DC on short notice this weekend to entertain her, I'm making a peppy music mix to send in my stead.

This is where y'all come in, 'cause my music library has never looked so angsty and depressing (and inappropriate -- Ben Folds, why do you say so many bad words?).

I'm looking for happy, silly, bouncy and otherwise cheerful songs to include on this mix -- appropriate for a 10-year-old who likes the Beatles, They Might Be Giants, and was raised on her dad's the Clash, Radiohead, and Belle & Sebastian albums. Actually, anything that sounds like the above bands would be welcome, bounciness optional, since quieter moments are nice, too.

Suggestions?