I need ideas for "a-thons"!! please helpp!?

I'm doing a fundraiser for my girl scout gold award and i need ideas for an a-thon. my ymca recently had a skip-it-a-thon, so something like that would be great. i thought of a dance-a-thon and a pogo stick-a-thon, but i'm not sure if i totally like those ideas yet. so if you have any suggestions, that would be greaat!