He's been here twice; both were great.  The second one was during the first summer of Covid, so was on Zoom.  He told the group they were getting to see things they wouldn't ordinarily be able to see and showed things he can't bring to presentations, but could show them because he was presenting from home.  Not being in person was hard on everyone that summer, and it helped for the kids to know they were getting something extra to offset (even just a little) the "we're stuck at home" nature of the summer.  Great dinosaur info and great presentation/relating to the group.