And none of them are cordless.
For those who have never visited the Smithsonian Museum, in Washington D.C., they have a plumb bob, hung from the ceiling - a very tall ceiling - at the entrance to, if I recall right, the Natural History Museum. This plumb bob swings, because of the rotation of the earth, and the length of the string. At the end of the swing length they sit up a ring of small pieces, couple of hundred maybe. They all sit on marked spots, and the plumb bob, swinging back and forth and around, knocks over these little pieces, one at a time. Takes quite awhile to knock all the pieces over, but very interesting. Every time I visited, there was always a circle of kids sitting on the floor around the whole thing, waiting for another piece to be knocked over. Used to visit the Smithsonian every 3 months or so, when I was assigned up there. My most favorite place in D.C. Oh yes, the best time of year to visit there is in the middle of winter, loads less people then, and can usually park no more than 3 or so spaces from the front door. That's because of all the people visiting Disney.
"It ain't what you're told, it's what you know." - Granny Weatherwax
Fawkahwe tribal police SWAT Team
Some days, the supply of available curse words is insufficient to meet my demands.
.....Call me a craftsman, artisan, or artistic, and I will accept that. Call me an artist and you will likely get a quite rude comment in return. I am not a @#$%ing artist.