I need your ideas

So, I have been asked to teach a cake decorating class in the evening RS mtg in Jan. I have NO idea what to teach/talk about. I have up to 30 minutes. Anything you would like to know or things others would might like to know?

For your viewing pleasure

I enjoy making cakes. Here is what I have done through October.

William's Birthday cakes.




Joseph's Dad's birthday cake



Parker's birthday cake.




not my best work, plus it melted on the ride home.

A going away present for one of Joseph's buddies at work.

A cake from class.

A birthday cake for one of Joseph's friends at work