This is a link to a PDF of several "spinners" with a cutsy Valentine theme that could just possibly demonstrate persistance of vision or could just keep a small girl happy with some scissors and glue for half an hour 
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They look fun; i’m trying to think how to tie the string though; is it a doubled piecce on each side?
Comment by Merry — February 12, 2007 @ 11:55 pm
You know I spent the afternoon trying to sort that out! My conclusion was to stick the paper onto stiff card as otherwise they aren’t sturdy or heavy enough to spin up properly then loop a double thread through each hole. Worked well enough to demonstrate the point and the failures worked well enough to point out how you need to line everything up properly otherwise you get a lopsided efect.
Comment by Administrator — February 13, 2007 @ 8:18 pm