Friday, 28 January 2011

How does teacher's topper work?


Teacher has a great topper to sharpen our pencils.  Sometimes it gets stuck so teacher takes it apart and fixes it so it can work again.  We were wondering how it works, so teacher took it apart and showed us.  There is a little cog wheel in it (like the cogs we play with), and there are 2 little pinchers, like fingers, on a spring to hold the pencil in place.  Unlike the usual toppers, the pencil does not twist, it is the topper itself that twists, when you turn the handle.  It is really interesting finding out how things work.

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