There are lots of different models of paper airplane that you can make. Some are good for gliding, some are good for tricks, and some are just plain odd looking!
Check out these ones! Each paper airplane has a video taking you through how to make it, and a printable template to help you fold it (and make it look cool):

Twirling Dirigible
You can't get more simple than this! Sure its flight performance is extremely limited, but it's mesmerizing to watch especially if you can launch from a height! You will need paper and scissors.
CLICK HERE for printout
Loop Glider
A cool looking long flying straight glider. You will need paper, scissors, tape and a straw.
CLICK HERE for printout
Fling-a-Ring
Great for high speed flight. Looks unlike any aircraft you have seen. You will need paper and tape.
CLICK HERE for printout
Stunt Flyer
Designed for loop and turns. You will need paper and scissors.
CLICK HERE for printout

SAFETY NOTE - Always fly responsibly. Paper airplanes can cause paper cuts, eye injuries and unfortunate pet related damage to Faberge Eggs and Ming vases.