We are studying atoms and elements. I spent one class period having my students learn tinkercad. The next day I gave them a task to complete. They had to choose an element from period 2, and make a 3difference printable model of it which contained the correct number of protons neutrons and electrons. The results have been really neat. They got very creative. If you try this, make sure you assign specific dimension requirements so the prints don't take too long.