manual

You need:
plastic cup
water
Changing Direction card
37
How to do it:
1) Bend the part of the card with the
arrow and make it stay upright
(rest it on something). Put the cup
in the circle. Look through the cup
and pay special attention to the
direction of the arrow.
2) Fill the cup with water
and look again. The arrow
is pointing in the opposite
direction and the name of
the city is now legible.
Note: To best see this effect,
keep your face at least
one foot away from
the glass.