This activity is great at explaining the movement of the earth and the fact that it both rotates and revolves as well as the difference between the two. I also really appreciate that the activity comes with a set both for the Northern and Southern Hemisphere since depending on your position on the planet, some stars and constellations would be more visible than others. The activity itself is simple, but fun to make and I like that we’re encouraged to use our Universe in a Box to teach others (and thus reinforce what we’ve just learned).