It's funny when you have kids a few years apart and you have to re-teach something that you did before.
It's great in a way because the oldest lids are like the test subjects, whereas the younger ones get the benefit of your experience.
A few years ago we worked on the Astronomy book in the elementary series from Apologia. We are in the process of reviewing their new version and so I am redoing the course with Captain.
I remembered today that when Jam and Boo were doing it we did a fun little project about the phases of the moon with oreo cookies. It was such a hit I had to do it again!