The Computer History Musuem was commemorating the 217th birthday of Charles Babbage. They have a replica of the Difference Engine No 2 on display. I got to wear a hat (another word I can say) but no-one let me have any of the birthday cake.
It weighs over 5 tons and has 8000+ moving parts. If only I'd brought my new tool set with hammer ("bang-bang") and screw drivers I could take this thing apart. Then I'd be able to fit the pieces in my mouth.