So this is cheap easy and cute. It's really great for the summer.
I've put up a tute for you so you can make one.
You will need:
a screw hole punch
An old mouse pad
Make sure your cards are lined up. This is very important.
Punch a hole in the bottom center of the cards.
Now tie the string through the hole NOTE: not all the way. There should be enough room for you to spread out the fan.
Cut off any spare string and you'll be finished
(How was my first tute?)