I took a speech class for college last semester and the use of a sensory aid always benefits you. What I did was I brought in my skis, talked all about what they're made of, the technology in them, and what those double tipper things are for. But i first opened up about my love for skiing, how I got into it and so on. I would highly suggest bringing in your skis, because people love to look at different shit and not just another fuckhead in their class blabering on about pointless shit. Hope that helps.