If it's a craft fair ... I'd check as to what price range of goods have been successful at selling before. It'd be nice to do a bunch of quilts, though, if they are looking for under $5 items?
Anything that has skates!
I was at a skating regional competition once that had vendors ... and the original skating crafts were selling like hotcakes, because of course, not somethng so unique they cannot find in other places easily.