The paper crane has long been a symbol of friendship and peace (and they make nice gifts!). The legend says that if you can fold one thousand paper cranes, you will have a long and peaceful life (Cala of the USOP (aka MOI) started to do this, using old notices and recycled paper. I got to 400 and am taking a break.) If this interests you, you can learn how to fold them at
http://www.sadako.com/fold/folding.html. Make some and give some to your friends (and why not enemies?)!