Vermont Public Radio took on the challenge of explaining how Iowa caucuses work and tried to do it as easy to understand as possible, with the help of Legos. The entertaining two-minute video lays out the basics of the process and makes it clear why it’s important for all candidates to have knowledgeable supporters in each precinct.
If you want something more detailed, NPR put together an explainer on how the process works. It may be far less entertaining, but the guide clearly lays out the difference between the Republican and Democratic caucuses.
Alternatively, you could hear what Iowans have to say about the caucuses, courtesy of Mashable.