Here’s another cool example from the plant world that could be spiced up with a hands-on class activity/demo if you have plants available (e.g. feeding Venus fly traps - always fun to do with kids).
(https://www.sciencedirect.com/science/article/pii/S0960982220305674#fig4)
I imagine this would probably have to be redrawn as a more simplified version though, cutting out maybe all but the key events towards carnivory unless you want to get into discussing whole genome duplications (WGD) and gene loss as the genetic factors driving plant evolution.