Those are good examples of recent small-scale evolution (which a lot of, though not all, young-Earth creationists already accept) but it sounds like LW would really be better off starting from scratch with something beginner-level that kids and adults can both enjoy that walks you through the history of life and how we know what we know about the history of life at the same time - there's lots of that available, as both books and video, and even museums! Cosmos is just the most recent one I watched all the way through.

Throwing individual examples at people is something creationists are really good at countering or using for their own purposes, but a good foundation in how science knows what it knows is a lot harder to deal with.