Groups are trying to complete and exhaustive wildlife inventory of Geat Smoky Mountains National Park. Tops scientists are participating, but the interesting thing is that so are untrained children. There is plenty of work for anyone to do in as extensive a study as they are trying to accomplish.
I found this site while looking for something else, but it makes some points that I think are important in the grassroots sciences. The page talks about narrowing the focus of research topics until they are focused and relevant. It gives points to design research projects worth doing. A thought that I took away from this page was that we need to ask more questions that we don’t already know the answer to.