Because our next speech is a demonstration speech, I feel like it will be easy to establish goodwill with the audience. You can let your audience know that you want the best for them by showing them how to do something they might not be familiar with. This establishes trust and credibility if you show them how to do something right, or maybe showing them how to do something in a more effective way.
I think that demonstrating something newer to the audience is a good way of engaging us. I also like how you said it might not be something new, but it could be a more effective way of doing something.