Ready? First, melt your friendly plastic in boiling water. Shape your fangs, I don't want mine too sharp or it will look unnatural, but you can have your own fav fang shape. Put it on your canine and shape it again, so it fits your other teeth perfectly and does not cause you trouble in speaking. Then, let it cool. It will turn white. Apply a little bit of dental adhesive on your fang and put it on your canine. Hold it with your finger for few seconds and here you go!
Visit my profile for more cool tutorials! :D