King of the Data Jungle*
In this puppet show, a wise lion coaches an eager but inexperienced mouse through the process of normalization and (equally important) denormalization.
An experienced DBA who also happens to be a talking lion explains what normalization is, why it’s a good idea, and how to do it. When his pupil complains about performance slowdowns, he goes on to explain about when, why, and how we should denormalize. There are slides as well as puppets.
Just someone who’s been hacking for about 15 years, including 12 or so of SQL.