manual

23
an index card or
a thick sheet of paper
a glass
(or plastic cup)
3) W
ith a rapid movement, tur
n the
glass upside down, holding the card
in place with your hand for a second
or two. T
ake away your hand and the
water won’t pour out.
How to do it:
1) Fill the glass about half full
with water.
2) Wet the rim of the glass and lay
the index card on top of it.
water
You need: