manual

9
thin sewing
thread
two-color ring
South Pole
North Pole
How to do it:
1) Hang a two-color ring from a
piece of sewing thread as long
as your arm.
2) After a few swings, you will notice
that the yellow part of the ring
always ends up facing north.
3) To test this, keep jiggling the
ring about and you’ll find that
it still always ends up facing the
same direction.
You need: