Lots of Torque

With an output shaft speed of 36,760,000,000,000 years per revolution,
I am certain that there will be enough torque to rotate the concrete
block, unfortunately I won't be there to see it.

This one comes from MIT and is located at the Exploratorium in San Francisco.

Australian Beer Glasses

Classic!  I never did find out what make the "Speed Bottle Opener" faster than a regular bottle opener.

What's wrong here?

This is in a children's exhibit at the Discovery Science Center. Someone doesn't know the difference between a rat and a Tasmanian Devil. 

Royal Republic?

Why there is a statue of Spanish royalty under the dome in the State
Capitol of a republic is beyond me.