Believe it or not, you can catch Crappie on topwater flies. After 35 years of dropping flies on Indiana warmwaters I was lucky enough last summer to experience some topwater Crappie action on the West Fork of the White River. Throwing bugs I have thrown a thousand times around the same logs and for some reason the Crappie decided they wanted it.
Jr. had a similar experience recently fishing a favorite lake he frequent (which can not be named). He was throwing a mini version of his swimming frog and started catching a bunch of crappie on the surface. However, he did have to suffer through catching some Largemouth Bass and bluegill on this new productive pattern as well. We'll have to get a video on the site soon on tying this pattern. In the meantime, your topwater flies aren't just for bass.