Someday in my childhood、I wondered if I wind up all of string of a spider, how it would become.  And I tried. 

First, I had to find a spider which was not so big, not too much colorful, not so hairy one and of course I touched its string not its body.  Then hang it over the fence enough height in case if the string was very very long, and started to wind it with may forefingers. As I wind, the spider came near.  And he was in panic.  The I made him fall, string became longer, doing that again and again.

  Finally, the spider looked tired and it didn't become longer any more!  I watched it carefully and I found the string near his body looked wet with thick tinted liquid.  At a look, it was the last part.  That was it.

I convinced and satisfied with the experiment, threw th spider off to the ground, and went to another interest.  Kids should be cruel to pursue their curiosity....