Trying to Divide by 0 on a Mechanical Calculator

;)

Division by zero is a mathematical challenging concept: see what happens when you try in on a mechanical calculator https://t.co/cfo52jdEGr pic.twitter.com/5jho6XqX7Q

— Massimo (@Rainmaker1973) September 18, 2018

Upside-Down Dreidel Spinning

I prefer upside-down dreidel spinning. (It's in the wrist.)

As a kid, I didn't think spinning dreidels the normal way was sufficiently interesting, so I cultivated spinning them upside-down.

Pendulum Wave: Bowling Ball Edition

Go ahead: Take a look for yourself. It's pretty damn awesome! (I like demos.)

(Tip of the cap to Damien Storey.)