Technology Speaker/Presenter for Public Library makerspace--possible topics include: AR, VR, metaverse, robotics, 3D printing, etc

I need a technology expert to speak at our public library, either free (we are a non-profit) or low-fee (up to $300) to inform and entertain our patrons for a 1-hour (approx) session in October. Some possible subjects include: augmented reality (AR), virtual reality (VR), the "metaverse", robotics, 3D printing, etc. Associated equipment/props, and/or video for demonstration purposes would be great to include. This is a part of our Innovation Lab (makerspace/STEAM/STEM lab) programming, focusing on helping our patrons understand, learn & use high-tech technologies. Our library is in Fairfield County, CT. This would be a live, in-person program.