So I taught the kindergarten class today. I ended up teaching them some functional anatomy of a particular type of animal, using a coolio plastic model that you can disassemble into all of the main internal and external organs. They really loved it, and had lots of questions.
The funny thing was that there were two types of questions that were exactly the same as the two types of questions you get at academic seminars: actual questions versus “let me tell you this thing I thought/did that is only tangentially (if at all) relevant to your presentation”.
Anyway, it was really fun, although I was much more nervous than when giving an academic presentation, even ones in front of hundreds of people. Thanks to everyone who made suggestions!