CraftKitsandSupplies carries a nice selection of plastic Tri Beads. The Tri Beads are sold in several different colors. Tri Beads are a style of bead that is triangular in shape, and can be made of plastic or glass. These Tri Beads can be used with Alphabet Beadsto create beaded bracelets, beaded necklaces, beaded key chains and other kids craft projects.