Sunday and Monday, my wife and I swapped doing work and caring for the kids. Sunday was my day of childcare. I got them going in the morning, and managed to get out the door with them a bit after 9:00. We headed over to the Harvard Natural History Museum partly because it was raining, partly because it is free on Sunday mornings, and partly because I love the collections of animals and minerals. It’s just a cool place to hang out. We spent several hours there looking at fossils, stuffed animals, and videos about the changes in animal classification that have come about through DNA sequencing. The last bit probably went over the heads of the kids, though they were the ones who wanted to watch the video and stuck with it all of the way through. I wonder what they took away from that. It is not hard to know what they took away from the rest of it as animal names and parts of the experience kept popping up for the rest of the day.