ScienceForCitizens (www.ScienceForCitizens.net) is a website that connects millions of science and nature enthusiasts to real research projects they can do. There are thousands of existing “citizen-science” projects created by academics, community groups, and non-profits that need the help of volunteers. Such activities range from tracking the effect of climate change on butterfly migration to analyzing galaxies. We collect these projects in a searchable database and add a social network. In the process, we engage an active, affluent community and make it easy for advertisers and retailers to reach them. Think Amazon meets Match.com for citizen science.