Shark Tooth Necklaces. With the look of a real shark’s tooth! Kids will love wearing and sharing these authentic-looking Shark Tooth Necklaces. Hand out necklaces in birthday party treat bags or give each guest a Shark Tooth Necklace to wear as they arrive at your ocean-themed bash or beach party. Each 1 plastic tooth is on a 30 nylon cord. © OTC Our children’s necklace items contain breakaway features, attachments or materials required by the Consumer Product Safety Commission’s children’s jewelry standard.