Self- guided history lesson. He picks this stuff every morning...

That scientific apparatus is called 1000 beads. We left telling time, measurements and counting money out because Chinese use the 10 system and they are ahead of us. 
https://blossom.primal.net/a4914f27a302b317f6dcb3b57abaf6a18f67e161905bb0083fb5b51e5d6da21d.jpg