A Ninja Mask that comes in two pieces. The main piece and the teeth are completely separate from one another. I designed the teeth to be separate in order to make a variety of different colored teeth, silk or glow-in-the-dark, as well. The main piece has hooks near the ears to be used to attach to a strap to keep the mask fixed to the face of the wearer. The wearer can use any strap of their liking...I have chosen this one that is completely free https://www.thingiverse.com/thing:4249113. I don't recommend gluing the teeth to the mask, you can use the strap, main mask piece, and some rubber bands to keep the mask in place. After the mask is taught to the face, lift the chin and insert the teeth. The teeth fit comfortably along the face of the wearer without falling off.